diff --git a/test/runtime/samples/attribute-boolean-indeterminate/main.svelte b/test/runtime/samples/attribute-boolean-indeterminate/main.svelte
index ad065fbd13..3ce99d698e 100644
--- a/test/runtime/samples/attribute-boolean-indeterminate/main.svelte
+++ b/test/runtime/samples/attribute-boolean-indeterminate/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let indeterminate;
+</script>
+
 <input type='checkbox' indeterminate='{indeterminate}'>
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-dynamic-multiple/main.svelte b/test/runtime/samples/attribute-dynamic-multiple/main.svelte
index 4cf451668b..1d87cd9b2e 100644
--- a/test/runtime/samples/attribute-dynamic-multiple/main.svelte
+++ b/test/runtime/samples/attribute-dynamic-multiple/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let items;
+</script>
+
 {#each items as item, i}
 	<div class='{item.foo ? "foo" : ""} {item.bar ? "bar" : ""}'>{i + 1}</div>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-dynamic-type/main.svelte b/test/runtime/samples/attribute-dynamic-type/main.svelte
index 3aa25e3026..c8d7dd817e 100644
--- a/test/runtime/samples/attribute-dynamic-type/main.svelte
+++ b/test/runtime/samples/attribute-dynamic-type/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let inputType;
+	export let inputValue;
+</script>
+
 <input type='{inputType}' value='{inputValue}'>
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-namespaced/main.svelte b/test/runtime/samples/attribute-namespaced/main.svelte
index 57c7286ed9..63cae9e77f 100644
--- a/test/runtime/samples/attribute-namespaced/main.svelte
+++ b/test/runtime/samples/attribute-namespaced/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 <svg>
 	<use xlink:href="#{foo}"/>
 </svg>
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-partial-number/Component.svelte b/test/runtime/samples/attribute-partial-number/Component.svelte
index 039386e88b..02995c7e80 100644
--- a/test/runtime/samples/attribute-partial-number/Component.svelte
+++ b/test/runtime/samples/attribute-partial-number/Component.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <p data-value="{value}"></p>
diff --git a/test/runtime/samples/attribute-prefer-expression/main.svelte b/test/runtime/samples/attribute-prefer-expression/main.svelte
index 2dd12ded4f..5874626d94 100644
--- a/test/runtime/samples/attribute-prefer-expression/main.svelte
+++ b/test/runtime/samples/attribute-prefer-expression/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let foo;
+</script>
+
 <input type='radio' bind:group={foo} value='{false}'>
 <input type='radio' bind:group={foo} value='{true}'>
\ No newline at end of file
diff --git a/test/runtime/samples/await-containing-if/main.svelte b/test/runtime/samples/await-containing-if/main.svelte
index cab07e6499..c7472fd5d7 100644
--- a/test/runtime/samples/await-containing-if/main.svelte
+++ b/test/runtime/samples/await-containing-if/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let thePromise;
+	export let show;
+</script>
+
 <div>
 	{#await thePromise}
 		<p>loading...</p>
diff --git a/test/runtime/samples/await-in-each/main.svelte b/test/runtime/samples/await-in-each/main.svelte
index a928f933aa..8ad9578f25 100644
--- a/test/runtime/samples/await-in-each/main.svelte
+++ b/test/runtime/samples/await-in-each/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let items;
+</script>
+
 {#each items as item}
 	{#await item.data}
 		<p>{item.title}: loading...</p>
diff --git a/test/runtime/samples/await-set-simultaneous/main.svelte b/test/runtime/samples/await-set-simultaneous/main.svelte
index fa32f62f63..638b5e5251 100644
--- a/test/runtime/samples/await-set-simultaneous/main.svelte
+++ b/test/runtime/samples/await-set-simultaneous/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let promise;
+	export let answer;
+</script>
+
 {#if promise}
 	{#await promise}
 		<p>wait for it...</p>
diff --git a/test/runtime/samples/await-then-catch-anchor/main.svelte b/test/runtime/samples/await-then-catch-anchor/main.svelte
index 30a7589e3f..efa66bf7f4 100644
--- a/test/runtime/samples/await-then-catch-anchor/main.svelte
+++ b/test/runtime/samples/await-then-catch-anchor/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 <div>
 {#await thePromise}
 <p>loading...</p>
diff --git a/test/runtime/samples/await-then-catch-if/main.svelte b/test/runtime/samples/await-then-catch-if/main.svelte
index f0d6243d31..0759a083d5 100644
--- a/test/runtime/samples/await-then-catch-if/main.svelte
+++ b/test/runtime/samples/await-then-catch-if/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let show;
+	export let thePromise;
+</script>
+
 {#if show}
 	{#await thePromise}
 		<p>loading...</p>
diff --git a/test/runtime/samples/await-then-catch-multiple/main.svelte b/test/runtime/samples/await-then-catch-multiple/main.svelte
index 34cdcb9604..552b4c906f 100644
--- a/test/runtime/samples/await-then-catch-multiple/main.svelte
+++ b/test/runtime/samples/await-then-catch-multiple/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 {#await thePromise}
 	<p>loading...</p>
 {:then theValue}
diff --git a/test/runtime/samples/await-then-catch-no-values/main.svelte b/test/runtime/samples/await-then-catch-no-values/main.svelte
index f53591990a..2e72f4a81a 100644
--- a/test/runtime/samples/await-then-catch-no-values/main.svelte
+++ b/test/runtime/samples/await-then-catch-no-values/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 {#await thePromise}
 	waiting
 {:then}
diff --git a/test/runtime/samples/await-then-catch-non-promise/main.svelte b/test/runtime/samples/await-then-catch-non-promise/main.svelte
index 79f5162ace..0b842bae3b 100644
--- a/test/runtime/samples/await-then-catch-non-promise/main.svelte
+++ b/test/runtime/samples/await-then-catch-non-promise/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 {#await thePromise}
 	<p>loading...</p>
 {:then theValue}
diff --git a/test/runtime/samples/await-then-catch-order/main.svelte b/test/runtime/samples/await-then-catch-order/main.svelte
index 87b37bf27d..e64e05a464 100644
--- a/test/runtime/samples/await-then-catch-order/main.svelte
+++ b/test/runtime/samples/await-then-catch-order/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 {#await thePromise}
 	<p>loading...</p>
 {:then theValue}
diff --git a/test/runtime/samples/await-then-catch-static/main.svelte b/test/runtime/samples/await-then-catch-static/main.svelte
index b420fe969c..67e08f542a 100644
--- a/test/runtime/samples/await-then-catch-static/main.svelte
+++ b/test/runtime/samples/await-then-catch-static/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let promise;
+</script>
+
 {#await promise}
 	<p>loading...</p>
 {:then value}
diff --git a/test/runtime/samples/await-then-catch/main.svelte b/test/runtime/samples/await-then-catch/main.svelte
index 79f5162ace..0b842bae3b 100644
--- a/test/runtime/samples/await-then-catch/main.svelte
+++ b/test/runtime/samples/await-then-catch/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 {#await thePromise}
 	<p>loading...</p>
 {:then theValue}
diff --git a/test/runtime/samples/await-then-shorthand/main.svelte b/test/runtime/samples/await-then-shorthand/main.svelte
index aa2e3a76b2..ae444afba7 100644
--- a/test/runtime/samples/await-then-shorthand/main.svelte
+++ b/test/runtime/samples/await-then-shorthand/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let thePromise;
+</script>
+
 {#await thePromise then theValue}
 	<p>the value is {theValue}</p>
 {:catch theError}
diff --git a/test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte b/test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte
index 929dc42545..68bef624bc 100644
--- a/test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte
+++ b/test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte
@@ -1,2 +1,9 @@
+<script>
+	export let t;
+	export let d;
+	export let paused;
+	export let v;
+</script>
+
 <audio bind:currentTime={t} bind:duration={d} bind:paused bind:volume={v}
 	src='music.mp3'></audio>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-indirect/main.svelte b/test/runtime/samples/binding-indirect/main.svelte
index 4f455b3854..0fb0d9d4c9 100644
--- a/test/runtime/samples/binding-indirect/main.svelte
+++ b/test/runtime/samples/binding-indirect/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let selected;
+	export let tasks;
+</script>
+
 <select bind:value={selected}>
 	{#each tasks as task}
 		<option value='{task}'>{task.description}</option>
diff --git a/test/runtime/samples/binding-input-checkbox-group-outside-each/main.svelte b/test/runtime/samples/binding-input-checkbox-group-outside-each/main.svelte
index 1eb5f04ccb..10593c1379 100644
--- a/test/runtime/samples/binding-input-checkbox-group-outside-each/main.svelte
+++ b/test/runtime/samples/binding-input-checkbox-group-outside-each/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let selected;
+	export let values;
+</script>
+
 <label>
 	<input type="checkbox" value="{values[0]}" bind:group={selected} /> {values[0].name}
 </label>
diff --git a/test/runtime/samples/binding-input-checkbox-group/main.svelte b/test/runtime/samples/binding-input-checkbox-group/main.svelte
index bb9bb0abc3..0a6ad19192 100644
--- a/test/runtime/samples/binding-input-checkbox-group/main.svelte
+++ b/test/runtime/samples/binding-input-checkbox-group/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let selected;
+	export let values;
+</script>
+
 {#each values as value}
 	<label>
 		<input type="checkbox" value="{value}" bind:group={selected} /> {value.name}
diff --git a/test/runtime/samples/binding-input-checkbox-indeterminate/main.svelte b/test/runtime/samples/binding-input-checkbox-indeterminate/main.svelte
index 282d9f22e3..712d3180e6 100644
--- a/test/runtime/samples/binding-input-checkbox-indeterminate/main.svelte
+++ b/test/runtime/samples/binding-input-checkbox-indeterminate/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let checked;
+	export let indeterminate;
+</script>
+
 <input type='checkbox' bind:checked bind:indeterminate>
 <p>checked? {checked}</p>
 <p>indeterminate? {indeterminate}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-checkbox/main.svelte b/test/runtime/samples/binding-input-checkbox/main.svelte
index 4adfcdf8b8..1543be0d3c 100644
--- a/test/runtime/samples/binding-input-checkbox/main.svelte
+++ b/test/runtime/samples/binding-input-checkbox/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let foo;
+</script>
+
 <input type='checkbox' bind:checked={foo}>
 <p>{foo}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-number/main.svelte b/test/runtime/samples/binding-input-number/main.svelte
index 3e0edea1c5..e45b09f92c 100644
--- a/test/runtime/samples/binding-input-number/main.svelte
+++ b/test/runtime/samples/binding-input-number/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let count;
+</script>
+
 <input type='number' bind:value={count}>
 <p>{typeof count} {count}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-radio-group/main.svelte b/test/runtime/samples/binding-input-radio-group/main.svelte
index cd13f1f3ae..c24623a860 100644
--- a/test/runtime/samples/binding-input-radio-group/main.svelte
+++ b/test/runtime/samples/binding-input-radio-group/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let selected;
+	export let values;
+</script>
+
 {#each values as value}
 	<label>
 		<input type="radio" value="{value}" bind:group={selected} /> {value.name}
diff --git a/test/runtime/samples/binding-input-range-change/main.svelte b/test/runtime/samples/binding-input-range-change/main.svelte
index bf74042e21..9b20b0f02a 100644
--- a/test/runtime/samples/binding-input-range-change/main.svelte
+++ b/test/runtime/samples/binding-input-range-change/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let count;
+</script>
+
 <input type='range' bind:value={count}>
 <p>{typeof count} {count}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-range/main.svelte b/test/runtime/samples/binding-input-range/main.svelte
index bf74042e21..9b20b0f02a 100644
--- a/test/runtime/samples/binding-input-range/main.svelte
+++ b/test/runtime/samples/binding-input-range/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let count;
+</script>
+
 <input type='range' bind:value={count}>
 <p>{typeof count} {count}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text-contextual-deconflicted/main.svelte b/test/runtime/samples/binding-input-text-contextual-deconflicted/main.svelte
index ebaa1eda71..e9ffde2fb9 100644
--- a/test/runtime/samples/binding-input-text-contextual-deconflicted/main.svelte
+++ b/test/runtime/samples/binding-input-text-contextual-deconflicted/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let items;
+</script>
+
 <div><input bind:value={foo}><p>{foo}</p></div>
 
 {#each items as bar}
diff --git a/test/runtime/samples/binding-input-text-contextual/main.svelte b/test/runtime/samples/binding-input-text-contextual/main.svelte
index 6b6b57a353..a73342ae6b 100644
--- a/test/runtime/samples/binding-input-text-contextual/main.svelte
+++ b/test/runtime/samples/binding-input-text-contextual/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let items;
+</script>
+
 {#each items as item}
 	<div><input bind:value={item}><p>{item}</p></div>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text-deconflicted/main.svelte b/test/runtime/samples/binding-input-text-deconflicted/main.svelte
index e349b3779f..8b6f0191ec 100644
--- a/test/runtime/samples/binding-input-text-deconflicted/main.svelte
+++ b/test/runtime/samples/binding-input-text-deconflicted/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let component;
+</script>
+
 <h1>Hello {component.name}!</h1>
 <input bind:value={component.name}/>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text-deep-computed-dynamic/main.svelte b/test/runtime/samples/binding-input-text-deep-computed-dynamic/main.svelte
index a6d438c07d..abd5da8a84 100644
--- a/test/runtime/samples/binding-input-text-deep-computed-dynamic/main.svelte
+++ b/test/runtime/samples/binding-input-text-deep-computed-dynamic/main.svelte
@@ -1,2 +1,7 @@
+<script>
+	export let obj;
+	export let prop;
+</script>
+
 <input bind:value={obj[prop]}>
 <pre>{JSON.stringify(obj)}</pre>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text-deep-computed/main.svelte b/test/runtime/samples/binding-input-text-deep-computed/main.svelte
index 3a0df8a133..29fd1f0511 100644
--- a/test/runtime/samples/binding-input-text-deep-computed/main.svelte
+++ b/test/runtime/samples/binding-input-text-deep-computed/main.svelte
@@ -1,2 +1,7 @@
+<script>
+	export let user;
+	export let prop;
+</script>
+
 <input bind:value={user[prop]}>
 <p>hello {user.name}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.svelte b/test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.svelte
index c4cb5878f5..163f6fbb18 100644
--- a/test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.svelte
+++ b/test/runtime/samples/binding-input-text-deep-contextual-computed-dynamic/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let objects;
+	export let prop;
+</script>
+
 {#each objects as obj}
 	<input bind:value={obj[prop]}>
 	<pre>{JSON.stringify(obj)}</pre>
diff --git a/test/runtime/samples/binding-input-text-deep-contextual/main.svelte b/test/runtime/samples/binding-input-text-deep-contextual/main.svelte
index f6a1e7e525..fbc019d669 100644
--- a/test/runtime/samples/binding-input-text-deep-contextual/main.svelte
+++ b/test/runtime/samples/binding-input-text-deep-contextual/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let items;
+</script>
+
 {#each items as item}
 	<div><input bind:value={item.description}><p>{item.description}</p></div>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text-deep/main.svelte b/test/runtime/samples/binding-input-text-deep/main.svelte
index b4cf2b2ef7..f517e08c39 100644
--- a/test/runtime/samples/binding-input-text-deep/main.svelte
+++ b/test/runtime/samples/binding-input-text-deep/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let user;
+</script>
+
 <input bind:value={user.name}>
 <p>hello {user.name}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-text/main.svelte b/test/runtime/samples/binding-input-text/main.svelte
index 733af3474c..558dc9d538 100644
--- a/test/runtime/samples/binding-input-text/main.svelte
+++ b/test/runtime/samples/binding-input-text/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let name;
+</script>
+
 <input bind:value={name}>
 <p>hello {name}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-input-with-event/main.svelte b/test/runtime/samples/binding-input-with-event/main.svelte
index 8f7ed26f25..944099d370 100644
--- a/test/runtime/samples/binding-input-with-event/main.svelte
+++ b/test/runtime/samples/binding-input-with-event/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let a;
+	export let b;
+</script>
+
 <input bind:value={a} on:input='{() => b = 0}'>
\ No newline at end of file
diff --git a/test/runtime/samples/binding-select-implicit-option-value/main.svelte b/test/runtime/samples/binding-select-implicit-option-value/main.svelte
index c743caebdb..a6078d13c6 100644
--- a/test/runtime/samples/binding-select-implicit-option-value/main.svelte
+++ b/test/runtime/samples/binding-select-implicit-option-value/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let values;
+</script>
+
 <select bind:value={foo}>
 	{#each values as v}
 		<option>{v}</option>
diff --git a/test/runtime/samples/binding-select-initial-value-undefined/main.svelte b/test/runtime/samples/binding-select-initial-value-undefined/main.svelte
index 1e4b70df6f..5cb1e9fae7 100644
--- a/test/runtime/samples/binding-select-initial-value-undefined/main.svelte
+++ b/test/runtime/samples/binding-select-initial-value-undefined/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let selected;
+</script>
+
 <p>selected: {selected}</p>
 
 <select bind:value={selected}>
diff --git a/test/runtime/samples/binding-select-initial-value/main.svelte b/test/runtime/samples/binding-select-initial-value/main.svelte
index 1e4b70df6f..5cb1e9fae7 100644
--- a/test/runtime/samples/binding-select-initial-value/main.svelte
+++ b/test/runtime/samples/binding-select-initial-value/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let selected;
+</script>
+
 <p>selected: {selected}</p>
 
 <select bind:value={selected}>
diff --git a/test/runtime/samples/binding-select-late/main.svelte b/test/runtime/samples/binding-select-late/main.svelte
index 6c1d2973a2..52cc14528a 100644
--- a/test/runtime/samples/binding-select-late/main.svelte
+++ b/test/runtime/samples/binding-select-late/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let selected;
+	export let items;
+</script>
+
 <select bind:value={selected}>
 	{#each items as item}
 		<option>{item}</option>
diff --git a/test/runtime/samples/binding-select-multiple/main.svelte b/test/runtime/samples/binding-select-multiple/main.svelte
index e97c988c4c..2710d3461d 100644
--- a/test/runtime/samples/binding-select-multiple/main.svelte
+++ b/test/runtime/samples/binding-select-multiple/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let selected;
+</script>
+
 <select multiple bind:value={selected}>
 	<option>one</option>
 	<option>two</option>
diff --git a/test/runtime/samples/binding-select-optgroup/main.svelte b/test/runtime/samples/binding-select-optgroup/main.svelte
index 0a4ef44eb0..faea77cd57 100644
--- a/test/runtime/samples/binding-select-optgroup/main.svelte
+++ b/test/runtime/samples/binding-select-optgroup/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let name;
+</script>
+
 <h1>Hello {name}!</h1>
 
 <select bind:value={name}>
diff --git a/test/runtime/samples/binding-select/main.svelte b/test/runtime/samples/binding-select/main.svelte
index caa1a5b3a7..bf7eaecc84 100644
--- a/test/runtime/samples/binding-select/main.svelte
+++ b/test/runtime/samples/binding-select/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let selected;
+</script>
+
 <p>selected: {selected}</p>
 
 <select bind:value={selected}>
diff --git a/test/runtime/samples/binding-textarea/main.svelte b/test/runtime/samples/binding-textarea/main.svelte
index 5d4177bf92..cecddf624c 100644
--- a/test/runtime/samples/binding-textarea/main.svelte
+++ b/test/runtime/samples/binding-textarea/main.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let value;
+</script>
+
 <textarea bind:value></textarea>
 <p>{value}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/class-in-each/main.svelte b/test/runtime/samples/class-in-each/main.svelte
index 4998de3cea..c7b5d4b1b6 100644
--- a/test/runtime/samples/class-in-each/main.svelte
+++ b/test/runtime/samples/class-in-each/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let things;
+	export let selected;
+</script>
+
 {#each things as thing}
 	<div class:selected="{selected === thing}"></div>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/class-shortcut-with-class/main.svelte b/test/runtime/samples/class-shortcut-with-class/main.svelte
index 72c1d4f8d4..12cde899cc 100644
--- a/test/runtime/samples/class-shortcut-with-class/main.svelte
+++ b/test/runtime/samples/class-shortcut-with-class/main.svelte
@@ -1 +1,8 @@
+<script>
+	export let myClass;
+	export let foo;
+	export let bar;
+	export let unused;
+</script>
+
 <div class={myClass} class:foo class:bar class:unused></div>
\ No newline at end of file
diff --git a/test/runtime/samples/class-shortcut/main.svelte b/test/runtime/samples/class-shortcut/main.svelte
index fe14d4de06..f98b8ed351 100644
--- a/test/runtime/samples/class-shortcut/main.svelte
+++ b/test/runtime/samples/class-shortcut/main.svelte
@@ -1 +1,7 @@
+<script>
+	export let foo;
+	export let bar;
+	export let unused;
+</script>
+
 <div class:foo class:bar class:unused></div>
\ No newline at end of file
diff --git a/test/runtime/samples/class-with-dynamic-attribute/main.svelte b/test/runtime/samples/class-with-dynamic-attribute/main.svelte
index 2097c465d9..3752c025d2 100644
--- a/test/runtime/samples/class-with-dynamic-attribute/main.svelte
+++ b/test/runtime/samples/class-with-dynamic-attribute/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let myClass;
+</script>
+
 <div class={myClass} class:three={true}></div>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-computed/Nested.svelte b/test/runtime/samples/component-binding-computed/Nested.svelte
index 642aa7eb34..e49410b7f7 100644
--- a/test/runtime/samples/component-binding-computed/Nested.svelte
+++ b/test/runtime/samples/component-binding-computed/Nested.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let value;
+	export let field;
+</script>
+
 <label>
 	{field} <input bind:value>
 </label>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte b/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
index 9b55ab769d..f2502fd374 100644
--- a/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
+++ b/test/runtime/samples/component-binding-deep-b/ComponentSelector.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let selectedComponent;
+	export let components;
+</script>
+
 <select bind:value={selectedComponent}>
 	{#each components as component}
 		<option value='{component}'>{component.name}.svelte</option>
diff --git a/test/runtime/samples/component-binding-deep-b/Editor.svelte b/test/runtime/samples/component-binding-deep-b/Editor.svelte
index cd3b080a99..3b2692df19 100644
--- a/test/runtime/samples/component-binding-deep-b/Editor.svelte
+++ b/test/runtime/samples/component-binding-deep-b/Editor.svelte
@@ -1 +1,5 @@
+<script>
+	export let code;
+</script>
+
 <textarea bind:value={code}></textarea>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-deep/Widget.svelte b/test/runtime/samples/component-binding-deep/Widget.svelte
index f24d608cd5..3714351783 100644
--- a/test/runtime/samples/component-binding-deep/Widget.svelte
+++ b/test/runtime/samples/component-binding-deep/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <input bind:value>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-each-nested/Widget.svelte b/test/runtime/samples/component-binding-each-nested/Widget.svelte
index f24d608cd5..3714351783 100644
--- a/test/runtime/samples/component-binding-each-nested/Widget.svelte
+++ b/test/runtime/samples/component-binding-each-nested/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <input bind:value>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-each-object/Widget.svelte b/test/runtime/samples/component-binding-each-object/Widget.svelte
index 176e7ac3cf..d449e6024f 100644
--- a/test/runtime/samples/component-binding-each-object/Widget.svelte
+++ b/test/runtime/samples/component-binding-each-object/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <span>{value.id}</span>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-each/Widget.svelte b/test/runtime/samples/component-binding-each/Widget.svelte
index f24d608cd5..3714351783 100644
--- a/test/runtime/samples/component-binding-each/Widget.svelte
+++ b/test/runtime/samples/component-binding-each/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <input bind:value>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-nested/Baz.svelte b/test/runtime/samples/component-binding-nested/Baz.svelte
index cd2cb5d0d8..bbfe33482b 100644
--- a/test/runtime/samples/component-binding-nested/Baz.svelte
+++ b/test/runtime/samples/component-binding-nested/Baz.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let x;
+</script>
+
 <button class='baz' on:click='{() => x = "r"}'>baz</button>
 <p>baz x: {x}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/component-binding-self-destroying/Nested.svelte b/test/runtime/samples/component-binding-self-destroying/Nested.svelte
index a3dc510afc..f0355d16a5 100644
--- a/test/runtime/samples/component-binding-self-destroying/Nested.svelte
+++ b/test/runtime/samples/component-binding-self-destroying/Nested.svelte
@@ -1 +1,5 @@
+<script>
+	export let show;
+</script>
+
 <button on:click="{() => show = false}">Hide</button>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-dynamic-late/Widget.svelte b/test/runtime/samples/component-data-dynamic-late/Widget.svelte
index 242d51b65b..5ac3701e47 100644
--- a/test/runtime/samples/component-data-dynamic-late/Widget.svelte
+++ b/test/runtime/samples/component-data-dynamic-late/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let p;
+</script>
+
 <p>{p}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-dynamic-shorthand/Widget.svelte b/test/runtime/samples/component-data-dynamic-shorthand/Widget.svelte
index ca3107eb98..b1be76b4be 100644
--- a/test/runtime/samples/component-data-dynamic-shorthand/Widget.svelte
+++ b/test/runtime/samples/component-data-dynamic-shorthand/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <p>foo: {foo}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-dynamic/Widget.svelte b/test/runtime/samples/component-data-dynamic/Widget.svelte
index b34c2ef085..a52b8d1eaa 100644
--- a/test/runtime/samples/component-data-dynamic/Widget.svelte
+++ b/test/runtime/samples/component-data-dynamic/Widget.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let foo;
+	export let baz;
+	export let qux;
+	export let quux;
+</script>
+
 <p>foo: {foo}</p>
 <p>baz: {baz} ({typeof baz})</p>
 <p>qux: {qux}</p>
diff --git a/test/runtime/samples/component-data-empty/Widget.svelte b/test/runtime/samples/component-data-empty/Widget.svelte
index d504b84374..f2266de567 100644
--- a/test/runtime/samples/component-data-empty/Widget.svelte
+++ b/test/runtime/samples/component-data-empty/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <p>foo: '{foo}'</p>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static-boolean-regression/Link.svelte b/test/runtime/samples/component-data-static-boolean-regression/Link.svelte
index ecb75d4f33..301fd2e4a1 100644
--- a/test/runtime/samples/component-data-static-boolean-regression/Link.svelte
+++ b/test/runtime/samples/component-data-static-boolean-regression/Link.svelte
@@ -1 +1,5 @@
+<script>
+	export let href;
+</script>
+
 <a href={href}>link</a>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static-boolean/Foo.svelte b/test/runtime/samples/component-data-static-boolean/Foo.svelte
index 780198e0ef..15f9f556de 100644
--- a/test/runtime/samples/component-data-static-boolean/Foo.svelte
+++ b/test/runtime/samples/component-data-static-boolean/Foo.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>x: {x} ({typeof x})</p>
\ No newline at end of file
diff --git a/test/runtime/samples/component-data-static/Widget.svelte b/test/runtime/samples/component-data-static/Widget.svelte
index bf52f4acfb..8d0b28a924 100644
--- a/test/runtime/samples/component-data-static/Widget.svelte
+++ b/test/runtime/samples/component-data-static/Widget.svelte
@@ -1,2 +1,7 @@
+<script>
+	export let foo;
+	export let baz;
+</script>
+
 <p>foo: {foo}</p>
 <p>baz: {baz} ({typeof baz})</p>
\ No newline at end of file
diff --git a/test/runtime/samples/component-name-deconflicted/Nested.svelte b/test/runtime/samples/component-name-deconflicted/Nested.svelte
index 03411fbff3..fe7e76dd64 100644
--- a/test/runtime/samples/component-name-deconflicted/Nested.svelte
+++ b/test/runtime/samples/component-name-deconflicted/Nested.svelte
@@ -1 +1,5 @@
+<script>
+	export let nested;
+</script>
+
 <span>{nested}</span>
\ No newline at end of file
diff --git a/test/runtime/samples/component-nested-deeper/Level2.svelte b/test/runtime/samples/component-nested-deeper/Level2.svelte
index 940698ce74..7249b0037b 100644
--- a/test/runtime/samples/component-nested-deeper/Level2.svelte
+++ b/test/runtime/samples/component-nested-deeper/Level2.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let condition;
+</script>
+
 
 
 <div class="level2">
diff --git a/test/runtime/samples/component-slot-let-aliased/Nested.svelte b/test/runtime/samples/component-slot-let-aliased/Nested.svelte
index 38c6ed6cbe..3758adbd7c 100644
--- a/test/runtime/samples/component-slot-let-aliased/Nested.svelte
+++ b/test/runtime/samples/component-slot-let-aliased/Nested.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 <div>
 	{#each things as thing}
 		<slot {thing}/>
diff --git a/test/runtime/samples/component-slot-let-destructured/Nested.svelte b/test/runtime/samples/component-slot-let-destructured/Nested.svelte
index 38c6ed6cbe..3758adbd7c 100644
--- a/test/runtime/samples/component-slot-let-destructured/Nested.svelte
+++ b/test/runtime/samples/component-slot-let-destructured/Nested.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 <div>
 	{#each things as thing}
 		<slot {thing}/>
diff --git a/test/runtime/samples/component-slot-let-named/Nested.svelte b/test/runtime/samples/component-slot-let-named/Nested.svelte
index d95593fc18..a3b09ff5b2 100644
--- a/test/runtime/samples/component-slot-let-named/Nested.svelte
+++ b/test/runtime/samples/component-slot-let-named/Nested.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 <div>
 	{#each things as thing}
 		<slot name="foo" {thing}/>
diff --git a/test/runtime/samples/component-slot-let/Nested.svelte b/test/runtime/samples/component-slot-let/Nested.svelte
index 38c6ed6cbe..3758adbd7c 100644
--- a/test/runtime/samples/component-slot-let/Nested.svelte
+++ b/test/runtime/samples/component-slot-let/Nested.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 <div>
 	{#each things as thing}
 		<slot {thing}/>
diff --git a/test/runtime/samples/component-static-at-symbol/Email.svelte b/test/runtime/samples/component-static-at-symbol/Email.svelte
index 8af8c3d3b1..711fefb829 100644
--- a/test/runtime/samples/component-static-at-symbol/Email.svelte
+++ b/test/runtime/samples/component-static-at-symbol/Email.svelte
@@ -1 +1,5 @@
+<script>
+	export let address;
+</script>
+
 <a href='mailto:{address}'>email</a>
\ No newline at end of file
diff --git a/test/runtime/samples/component-yield-nested-if/Outer.svelte b/test/runtime/samples/component-yield-nested-if/Outer.svelte
index 1d5fd34e1a..637bae0dec 100644
--- a/test/runtime/samples/component-yield-nested-if/Outer.svelte
+++ b/test/runtime/samples/component-yield-nested-if/Outer.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 {#if foo}
 	<slot></slot>
 {/if}
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-contexts/main.svelte b/test/runtime/samples/deconflict-contexts/main.svelte
index 84cdb1bca0..f971a01cf8 100644
--- a/test/runtime/samples/deconflict-contexts/main.svelte
+++ b/test/runtime/samples/deconflict-contexts/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let components;
+</script>
+
 <ul>
 	{#each components as component}
 		<li>{component}</li>
diff --git a/test/runtime/samples/dev-warning-missing-data-binding/main.svelte b/test/runtime/samples/dev-warning-missing-data-binding/main.svelte
index f24d608cd5..3714351783 100644
--- a/test/runtime/samples/dev-warning-missing-data-binding/main.svelte
+++ b/test/runtime/samples/dev-warning-missing-data-binding/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <input bind:value>
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-missing-data-component/Foo.svelte b/test/runtime/samples/dev-warning-missing-data-component/Foo.svelte
index 8f26d21baf..95422444cc 100644
--- a/test/runtime/samples/dev-warning-missing-data-component/Foo.svelte
+++ b/test/runtime/samples/dev-warning-missing-data-component/Foo.svelte
@@ -1 +1,6 @@
+<script>
+	export let x;
+	export let y;
+</script>
+
 <div>{x} {y}</div>
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-missing-data-each/main.svelte b/test/runtime/samples/dev-warning-missing-data-each/main.svelte
index 6b6a72204e..55ac7a7b47 100644
--- a/test/runtime/samples/dev-warning-missing-data-each/main.svelte
+++ b/test/runtime/samples/dev-warning-missing-data-each/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let letters;
+</script>
+
 {#each letters as letter (letter.id)}
   <div>{letter.char}</div>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-missing-data/main.svelte b/test/runtime/samples/dev-warning-missing-data/main.svelte
index 4efe809843..0e9f45ab16 100644
--- a/test/runtime/samples/dev-warning-missing-data/main.svelte
+++ b/test/runtime/samples/dev-warning-missing-data/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let bar;
+</script>
+
 <p>
 	{Math.max(0, foo)}
 	{bar}
diff --git a/test/runtime/samples/dev-warning-readonly-window-binding/main.svelte b/test/runtime/samples/dev-warning-readonly-window-binding/main.svelte
index bd2d50d388..06194394c5 100644
--- a/test/runtime/samples/dev-warning-readonly-window-binding/main.svelte
+++ b/test/runtime/samples/dev-warning-readonly-window-binding/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let width;
+</script>
+
 <svelte:window bind:innerWidth={width}/>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated/Green.svelte b/test/runtime/samples/dynamic-component-bindings-recreated/Green.svelte
index b4faa1b662..63c2e25090 100644
--- a/test/runtime/samples/dynamic-component-bindings-recreated/Green.svelte
+++ b/test/runtime/samples/dynamic-component-bindings-recreated/Green.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <p>green {foo}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings-recreated/Red.svelte b/test/runtime/samples/dynamic-component-bindings-recreated/Red.svelte
index a3e3c792a0..aaaade509e 100644
--- a/test/runtime/samples/dynamic-component-bindings-recreated/Red.svelte
+++ b/test/runtime/samples/dynamic-component-bindings-recreated/Red.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <p>red {foo}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings/Bar.svelte b/test/runtime/samples/dynamic-component-bindings/Bar.svelte
index 71e6fd8acc..7f215faa3f 100644
--- a/test/runtime/samples/dynamic-component-bindings/Bar.svelte
+++ b/test/runtime/samples/dynamic-component-bindings/Bar.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let z;
+</script>
+
 <p>bar</p>
 <input type='checkbox' bind:checked={z}>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-bindings/Foo.svelte b/test/runtime/samples/dynamic-component-bindings/Foo.svelte
index 01faecfa49..5ed139be24 100644
--- a/test/runtime/samples/dynamic-component-bindings/Foo.svelte
+++ b/test/runtime/samples/dynamic-component-bindings/Foo.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let y;
+</script>
+
 <p>foo</p>
 <input bind:value={y}>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-destroy-null/main.svelte b/test/runtime/samples/dynamic-component-destroy-null/main.svelte
index 401b86d1f6..6b58e61267 100644
--- a/test/runtime/samples/dynamic-component-destroy-null/main.svelte
+++ b/test/runtime/samples/dynamic-component-destroy-null/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let x;
+</script>
+
 {#if x}
 	<svelte:component this={null}/>
 {/if}
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-inside-element/Bar.svelte b/test/runtime/samples/dynamic-component-inside-element/Bar.svelte
index 79e01b851c..2a3ebfca74 100644
--- a/test/runtime/samples/dynamic-component-inside-element/Bar.svelte
+++ b/test/runtime/samples/dynamic-component-inside-element/Bar.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>{x}, therefore Bar</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-inside-element/Foo.svelte b/test/runtime/samples/dynamic-component-inside-element/Foo.svelte
index cb35cfc082..d2434520f7 100644
--- a/test/runtime/samples/dynamic-component-inside-element/Foo.svelte
+++ b/test/runtime/samples/dynamic-component-inside-element/Foo.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>{x}, therefore Foo</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-update-existing-instance/Bar.svelte b/test/runtime/samples/dynamic-component-update-existing-instance/Bar.svelte
index 36fa195dcd..6b7e486eba 100644
--- a/test/runtime/samples/dynamic-component-update-existing-instance/Bar.svelte
+++ b/test/runtime/samples/dynamic-component-update-existing-instance/Bar.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>Bar {x}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component-update-existing-instance/Foo.svelte b/test/runtime/samples/dynamic-component-update-existing-instance/Foo.svelte
index 0a9cd0047a..4a4debdb12 100644
--- a/test/runtime/samples/dynamic-component-update-existing-instance/Foo.svelte
+++ b/test/runtime/samples/dynamic-component-update-existing-instance/Foo.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>Foo {x}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component/Bar.svelte b/test/runtime/samples/dynamic-component/Bar.svelte
index 79e01b851c..2a3ebfca74 100644
--- a/test/runtime/samples/dynamic-component/Bar.svelte
+++ b/test/runtime/samples/dynamic-component/Bar.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>{x}, therefore Bar</p>
\ No newline at end of file
diff --git a/test/runtime/samples/dynamic-component/Foo.svelte b/test/runtime/samples/dynamic-component/Foo.svelte
index cb35cfc082..d2434520f7 100644
--- a/test/runtime/samples/dynamic-component/Foo.svelte
+++ b/test/runtime/samples/dynamic-component/Foo.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <p>{x}, therefore Foo</p>
\ No newline at end of file
diff --git a/test/runtime/samples/each-block-containing-component-in-if/Nested.svelte b/test/runtime/samples/each-block-containing-component-in-if/Nested.svelte
index 0ceac58d9c..534db38385 100644
--- a/test/runtime/samples/each-block-containing-component-in-if/Nested.svelte
+++ b/test/runtime/samples/each-block-containing-component-in-if/Nested.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let show;
+	export let fields;
+</script>
+
 {#if show}
 	{#each fields as field}
 		<span>{field}</span>
diff --git a/test/runtime/samples/each-block-deconflict-name-context/main.svelte b/test/runtime/samples/each-block-deconflict-name-context/main.svelte
index 391e42ecd0..62c13b2e59 100644
--- a/test/runtime/samples/each-block-deconflict-name-context/main.svelte
+++ b/test/runtime/samples/each-block-deconflict-name-context/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 {#each foo.bar as bar}
 	<input bind:value={bar}>
 {/each}
diff --git a/test/runtime/samples/each-block-destructured-array-sparse/main.svelte b/test/runtime/samples/each-block-destructured-array-sparse/main.svelte
index 7ca8e403d8..587017bc04 100644
--- a/test/runtime/samples/each-block-destructured-array-sparse/main.svelte
+++ b/test/runtime/samples/each-block-destructured-array-sparse/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animalPawsEntries;
+</script>
+
 {#each animalPawsEntries as [, pawType]}
 	<p>{pawType}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-destructured-array/main.svelte b/test/runtime/samples/each-block-destructured-array/main.svelte
index bf70195880..db93ffa622 100644
--- a/test/runtime/samples/each-block-destructured-array/main.svelte
+++ b/test/runtime/samples/each-block-destructured-array/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animalPawsEntries;
+</script>
+
 {#each animalPawsEntries as [animal, pawType]}
 	<p>{animal}: {pawType}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-destructured-object-binding/main.svelte b/test/runtime/samples/each-block-destructured-object-binding/main.svelte
index dcdd7c0f6b..37993d83c1 100644
--- a/test/runtime/samples/each-block-destructured-object-binding/main.svelte
+++ b/test/runtime/samples/each-block-destructured-object-binding/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let people;
+</script>
+
 {#each people as { name: { first: f, last: l } } }
 	<input bind:value={f}>
 	<input bind:value={l}>
diff --git a/test/runtime/samples/each-block-destructured-object/main.svelte b/test/runtime/samples/each-block-destructured-object/main.svelte
index d759dabf9b..8432d72335 100644
--- a/test/runtime/samples/each-block-destructured-object/main.svelte
+++ b/test/runtime/samples/each-block-destructured-object/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animalPawsEntries;
+</script>
+
 {#each animalPawsEntries as { animal, pawType } }
 	<p>{animal}: {pawType}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-dynamic-else-static/main.svelte b/test/runtime/samples/each-block-dynamic-else-static/main.svelte
index 86245d2486..ec8e82913a 100644
--- a/test/runtime/samples/each-block-dynamic-else-static/main.svelte
+++ b/test/runtime/samples/each-block-dynamic-else-static/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animals;
+</script>
+
 {#each animals as animal}
 	<p>{animal}</p>
 {:else}
diff --git a/test/runtime/samples/each-block-else-starts-empty/main.svelte b/test/runtime/samples/each-block-else-starts-empty/main.svelte
index c202670ed5..3275cb1f83 100644
--- a/test/runtime/samples/each-block-else-starts-empty/main.svelte
+++ b/test/runtime/samples/each-block-else-starts-empty/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let animals;
+	export let foo;
+</script>
+
 before
 {#each animals as animal}
 	<p>{animal}</p>
diff --git a/test/runtime/samples/each-block-else/main.svelte b/test/runtime/samples/each-block-else/main.svelte
index c202670ed5..3275cb1f83 100644
--- a/test/runtime/samples/each-block-else/main.svelte
+++ b/test/runtime/samples/each-block-else/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let animals;
+	export let foo;
+</script>
+
 before
 {#each animals as animal}
 	<p>{animal}</p>
diff --git a/test/runtime/samples/each-block-empty-outro/Thing.svelte b/test/runtime/samples/each-block-empty-outro/Thing.svelte
index 150c8fd252..d3707c7d8b 100644
--- a/test/runtime/samples/each-block-empty-outro/Thing.svelte
+++ b/test/runtime/samples/each-block-empty-outro/Thing.svelte
@@ -1 +1,5 @@
+<script>
+	export let thing;
+</script>
+
 <p>{thing}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/each-block-in-if-block/main.svelte b/test/runtime/samples/each-block-in-if-block/main.svelte
index 4c71f3e5b3..2746fd960a 100644
--- a/test/runtime/samples/each-block-in-if-block/main.svelte
+++ b/test/runtime/samples/each-block-in-if-block/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let fruits;
+</script>
+
 <div>
 	{#if fruits}
 		{#each fruits as fruit (fruit)}
diff --git a/test/runtime/samples/each-block-index-only/main.svelte b/test/runtime/samples/each-block-index-only/main.svelte
index 83fb0e6b8e..d1314cbb82 100644
--- a/test/runtime/samples/each-block-index-only/main.svelte
+++ b/test/runtime/samples/each-block-index-only/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 {#each things as _, i}
 	<p>{i}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-indexed/main.svelte b/test/runtime/samples/each-block-indexed/main.svelte
index d5602ec82c..3dc8797481 100644
--- a/test/runtime/samples/each-block-indexed/main.svelte
+++ b/test/runtime/samples/each-block-indexed/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animals;
+</script>
+
 {#each animals as animal, i}
 	<p>{i}: {animal}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-keyed-dynamic/main.svelte b/test/runtime/samples/each-block-keyed-dynamic/main.svelte
index cc5f25a0ef..0c50a62661 100644
--- a/test/runtime/samples/each-block-keyed-dynamic/main.svelte
+++ b/test/runtime/samples/each-block-keyed-dynamic/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let todos;
+</script>
+
 {#each todos as todo (todo.id)}
 	<p>{todo.description}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-keyed-empty/main.svelte b/test/runtime/samples/each-block-keyed-empty/main.svelte
index 1d45aefa53..f8ee322ce6 100644
--- a/test/runtime/samples/each-block-keyed-empty/main.svelte
+++ b/test/runtime/samples/each-block-keyed-empty/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 {#each x as y (y.z)}{/each}
diff --git a/test/runtime/samples/each-block-keyed-non-prop/main.svelte b/test/runtime/samples/each-block-keyed-non-prop/main.svelte
index a3d28bb3e4..9b68992d3d 100644
--- a/test/runtime/samples/each-block-keyed-non-prop/main.svelte
+++ b/test/runtime/samples/each-block-keyed-non-prop/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let words;
+</script>
+
 {#each words as word (word)}
 	<p>{word}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-keyed-random-permute/main.svelte b/test/runtime/samples/each-block-keyed-random-permute/main.svelte
index 1dc93d9fa6..de70e90815 100644
--- a/test/runtime/samples/each-block-keyed-random-permute/main.svelte
+++ b/test/runtime/samples/each-block-keyed-random-permute/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let values;
+</script>
+
 {#each values as value (value.id)}
 	({value.id})
 {/each}
diff --git a/test/runtime/samples/each-block-keyed-siblings/main.svelte b/test/runtime/samples/each-block-keyed-siblings/main.svelte
index 575f0f2d93..561ea34c19 100644
--- a/test/runtime/samples/each-block-keyed-siblings/main.svelte
+++ b/test/runtime/samples/each-block-keyed-siblings/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let ones;
+	export let twos;
+</script>
+
 {#each ones as one (one.text)}
 	<div>{one.text}</div>
 {/each}
diff --git a/test/runtime/samples/each-block-keyed-static/main.svelte b/test/runtime/samples/each-block-keyed-static/main.svelte
index fa1b853d16..96c34dfc27 100644
--- a/test/runtime/samples/each-block-keyed-static/main.svelte
+++ b/test/runtime/samples/each-block-keyed-static/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let x;
+</script>
+
 {#each x as y (y.z)}
 	<p>does not change</p>
 {/each}
diff --git a/test/runtime/samples/each-block-keyed-unshift/Nested.svelte b/test/runtime/samples/each-block-keyed-unshift/Nested.svelte
index 4e9905910b..82df711742 100644
--- a/test/runtime/samples/each-block-keyed-unshift/Nested.svelte
+++ b/test/runtime/samples/each-block-keyed-unshift/Nested.svelte
@@ -1 +1,5 @@
+<script>
+	export let title;
+</script>
+
 <p>{title}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/each-block-keyed/main.svelte b/test/runtime/samples/each-block-keyed/main.svelte
index 3be42ebc77..520072ab2e 100644
--- a/test/runtime/samples/each-block-keyed/main.svelte
+++ b/test/runtime/samples/each-block-keyed/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let todos;
+</script>
+
 {#each todos as todo, i (todo.id)}
 	<p>{i+1}: {todo.description}</p>
 {/each}
diff --git a/test/runtime/samples/each-block-random-permute/main.svelte b/test/runtime/samples/each-block-random-permute/main.svelte
index 310003c701..0e7e2596c2 100644
--- a/test/runtime/samples/each-block-random-permute/main.svelte
+++ b/test/runtime/samples/each-block-random-permute/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let values;
+</script>
+
 {#each values as value}
 	({value})
 {/each}
diff --git a/test/runtime/samples/each-block-static/main.svelte b/test/runtime/samples/each-block-static/main.svelte
index b10d2d4fe6..93ae37cf1a 100644
--- a/test/runtime/samples/each-block-static/main.svelte
+++ b/test/runtime/samples/each-block-static/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let items;
+</script>
+
 {#each items as item}
 	foo
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/each-block-text-node/main.svelte b/test/runtime/samples/each-block-text-node/main.svelte
index a25b53ed35..c9be76b431 100644
--- a/test/runtime/samples/each-block-text-node/main.svelte
+++ b/test/runtime/samples/each-block-text-node/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animals;
+</script>
+
 {#each animals as animal}
 	({animal})
 {/each}
diff --git a/test/runtime/samples/each-block/main.svelte b/test/runtime/samples/each-block/main.svelte
index 83a5e88ddd..947ec6d723 100644
--- a/test/runtime/samples/each-block/main.svelte
+++ b/test/runtime/samples/each-block/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animals;
+</script>
+
 {#each animals as animal}
 	<p>{animal}</p>
 {/each}
diff --git a/test/runtime/samples/each-blocks-nested-b/main.svelte b/test/runtime/samples/each-blocks-nested-b/main.svelte
index 3e9acfe986..2cfe4be98a 100644
--- a/test/runtime/samples/each-blocks-nested-b/main.svelte
+++ b/test/runtime/samples/each-blocks-nested-b/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let categories;
+</script>
+
 {#each categories as category}
 	{#each category.things as thing}
 		<p>{category.name}: {thing.name}</p>
diff --git a/test/runtime/samples/each-blocks-nested/main.svelte b/test/runtime/samples/each-blocks-nested/main.svelte
index 004bfcbca9..cd5c3f3e8b 100644
--- a/test/runtime/samples/each-blocks-nested/main.svelte
+++ b/test/runtime/samples/each-blocks-nested/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let columns;
+	export let rows;
+</script>
+
 {#each columns as x}
 	{#each rows as y}
 		<div>{x}, {y}</div>
diff --git a/test/runtime/samples/escape-template-literals/Widget.svelte b/test/runtime/samples/escape-template-literals/Widget.svelte
index 5964bdac68..2ba74ee888 100644
--- a/test/runtime/samples/escape-template-literals/Widget.svelte
+++ b/test/runtime/samples/escape-template-literals/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <div>{value}</div>
diff --git a/test/runtime/samples/event-handler-deconflicted/main.svelte b/test/runtime/samples/event-handler-deconflicted/main.svelte
index 38c923794e..b34e17e8a3 100644
--- a/test/runtime/samples/event-handler-deconflicted/main.svelte
+++ b/test/runtime/samples/event-handler-deconflicted/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let foo;
+	export let click_handler;
+</script>
+
 <button on:click="{() => foo()}">{click_handler}</button>
\ No newline at end of file
diff --git a/test/runtime/samples/event-handler-each-context/main.svelte b/test/runtime/samples/event-handler-each-context/main.svelte
index 3b22ec529c..e30996b261 100644
--- a/test/runtime/samples/event-handler-each-context/main.svelte
+++ b/test/runtime/samples/event-handler-each-context/main.svelte
@@ -1,3 +1,9 @@
+<script>
+	export let items;
+	export let foo;
+	export let bar;
+</script>
+
 {#each items as item}
 	<button on:click='{() => foo = bar}'>{item}</button>
 {/each}
diff --git a/test/runtime/samples/event-handler-each-deconflicted/main.svelte b/test/runtime/samples/event-handler-each-deconflicted/main.svelte
index 165e535e95..96d20d4d85 100644
--- a/test/runtime/samples/event-handler-each-deconflicted/main.svelte
+++ b/test/runtime/samples/event-handler-each-deconflicted/main.svelte
@@ -1,3 +1,9 @@
+<script>
+	export let foo;
+	export let clicked;
+	export let bar;
+</script>
+
 {#each foo as f}
 	<button on:click='{() => clicked = "foo"}'>foo</button>
 {/each}
diff --git a/test/runtime/samples/event-handler-each/main.svelte b/test/runtime/samples/event-handler-each/main.svelte
index 3d1c5dcfd8..777fdb1c41 100644
--- a/test/runtime/samples/event-handler-each/main.svelte
+++ b/test/runtime/samples/event-handler-each/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let items;
+	export let selected;
+</script>
+
 {#each items as item}
 	<button on:click='{() => selected = item}'>{item}</button>
 {/each}
diff --git a/test/runtime/samples/event-handler-sanitize/main.svelte b/test/runtime/samples/event-handler-sanitize/main.svelte
index 7a5f39aa58..5171820c83 100644
--- a/test/runtime/samples/event-handler-sanitize/main.svelte
+++ b/test/runtime/samples/event-handler-sanitize/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let visible;
+</script>
+
 <div on:some-event='{() => visible = !visible}'>toggle</div>
 
 {#if visible}
diff --git a/test/runtime/samples/event-handler/main.svelte b/test/runtime/samples/event-handler/main.svelte
index 8dcaf1b701..67ce998eee 100644
--- a/test/runtime/samples/event-handler/main.svelte
+++ b/test/runtime/samples/event-handler/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let visible;
+</script>
+
 <button on:click='{() => visible = !visible}'>toggle</button>
 
 {#if visible}
diff --git a/test/runtime/samples/function-in-expression/main.svelte b/test/runtime/samples/function-in-expression/main.svelte
index 895a36e690..272c705165 100644
--- a/test/runtime/samples/function-in-expression/main.svelte
+++ b/test/runtime/samples/function-in-expression/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let numbers;
+</script>
+
 {numbers.filter(x => x % 2).join(', ')}
\ No newline at end of file
diff --git a/test/runtime/samples/get-after-destroy/main.svelte b/test/runtime/samples/get-after-destroy/main.svelte
index ea892526af..0831729fa5 100644
--- a/test/runtime/samples/get-after-destroy/main.svelte
+++ b/test/runtime/samples/get-after-destroy/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <div>{foo}</div>
\ No newline at end of file
diff --git a/test/runtime/samples/globals-not-dereferenced/main.svelte b/test/runtime/samples/globals-not-dereferenced/main.svelte
index ec39251992..a4a3b59d10 100644
--- a/test/runtime/samples/globals-not-dereferenced/main.svelte
+++ b/test/runtime/samples/globals-not-dereferenced/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 {Math.min(x, 5)}
diff --git a/test/runtime/samples/globals-not-overwritten-by-bindings/main.svelte b/test/runtime/samples/globals-not-overwritten-by-bindings/main.svelte
index 9c573a6319..602c8c8805 100644
--- a/test/runtime/samples/globals-not-overwritten-by-bindings/main.svelte
+++ b/test/runtime/samples/globals-not-overwritten-by-bindings/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let todos;
+</script>
+
 {#each Object.keys(todos) as key}
 	<div class='todo {todos[key].done ? "done": ""}'>
 		<input type='checkbox' bind:checked={todos[key].done}>
diff --git a/test/runtime/samples/hash-in-attribute/main.svelte b/test/runtime/samples/hash-in-attribute/main.svelte
index 0d1455b066..f250a8256b 100644
--- a/test/runtime/samples/hash-in-attribute/main.svelte
+++ b/test/runtime/samples/hash-in-attribute/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let links;
+</script>
+
 {#each links as link}
 	<a href="x#{link}">x#{link}</a>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/head-if-block/main.svelte b/test/runtime/samples/head-if-block/main.svelte
index 27d994335d..a6b115bf28 100644
--- a/test/runtime/samples/head-if-block/main.svelte
+++ b/test/runtime/samples/head-if-block/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let condition;
+</script>
+
 <svelte:head>
 	{#if condition}
 		<title>woo!!!</title>
diff --git a/test/runtime/samples/head-title-dynamic-simple/main.svelte b/test/runtime/samples/head-title-dynamic-simple/main.svelte
index d2ff2c596b..7fc54ba1d2 100644
--- a/test/runtime/samples/head-title-dynamic-simple/main.svelte
+++ b/test/runtime/samples/head-title-dynamic-simple/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 <svelte:head>
 	<title>{foo}</title>
 </svelte:head>
\ No newline at end of file
diff --git a/test/runtime/samples/head-title-dynamic/main.svelte b/test/runtime/samples/head-title-dynamic/main.svelte
index 255f344c00..60888e569e 100644
--- a/test/runtime/samples/head-title-dynamic/main.svelte
+++ b/test/runtime/samples/head-title-dynamic/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let adjective;
+</script>
+
 <svelte:head>
 	<title>a {adjective} title</title>
 	<meta name='twitter:creator' content='@sveltejs'>
diff --git a/test/runtime/samples/hello-world/main.svelte b/test/runtime/samples/hello-world/main.svelte
index 4820d55d09..538dc970e9 100644
--- a/test/runtime/samples/hello-world/main.svelte
+++ b/test/runtime/samples/hello-world/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let name;
+</script>
+
 <h1>Hello {name}!</h1>
diff --git a/test/runtime/samples/if-block-else-in-each/main.svelte b/test/runtime/samples/if-block-else-in-each/main.svelte
index 4df229b2e8..96ac5a6cdc 100644
--- a/test/runtime/samples/if-block-else-in-each/main.svelte
+++ b/test/runtime/samples/if-block-else-in-each/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let array;
+</script>
+
 {#each array as item}
 	{#if item}
 		<div>foo</div>
diff --git a/test/runtime/samples/if-block-else/main.svelte b/test/runtime/samples/if-block-else/main.svelte
index 997f503e98..e839f72191 100644
--- a/test/runtime/samples/if-block-else/main.svelte
+++ b/test/runtime/samples/if-block-else/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let bar;
+</script>
+
 {#if foo}
 	<p>foo</p>
 {:else}
diff --git a/test/runtime/samples/if-block-elseif-no-else/main.svelte b/test/runtime/samples/if-block-elseif-no-else/main.svelte
index 2566aef258..6d4f324717 100644
--- a/test/runtime/samples/if-block-elseif-no-else/main.svelte
+++ b/test/runtime/samples/if-block-elseif-no-else/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let x;
+</script>
+
 {#if x > 10}
 	<p>x is greater than 10</p>
 {:else if x < 5}
diff --git a/test/runtime/samples/if-block-elseif-text/main.svelte b/test/runtime/samples/if-block-elseif-text/main.svelte
index ea1e1aac43..d1c161f616 100644
--- a/test/runtime/samples/if-block-elseif-text/main.svelte
+++ b/test/runtime/samples/if-block-elseif-text/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 before-{#if x > 10}if{:else if x < 5}elseif{:else}else{/if}-after
diff --git a/test/runtime/samples/if-block-elseif/main.svelte b/test/runtime/samples/if-block-elseif/main.svelte
index d4833c7aeb..bf22945159 100644
--- a/test/runtime/samples/if-block-elseif/main.svelte
+++ b/test/runtime/samples/if-block-elseif/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let x;
+</script>
+
 {#if x > 10}
 	<p>x is greater than 10</p>
 {:else if x < 5}
diff --git a/test/runtime/samples/if-block-first/main.svelte b/test/runtime/samples/if-block-first/main.svelte
index bae6f01e10..b8680e7d4c 100644
--- a/test/runtime/samples/if-block-first/main.svelte
+++ b/test/runtime/samples/if-block-first/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let visible;
+</script>
+
 <div>
 	{#if visible}
 		<div>i am visible</div>
diff --git a/test/runtime/samples/if-block-or/main.svelte b/test/runtime/samples/if-block-or/main.svelte
index 8f3713bffb..5e9268fb1d 100644
--- a/test/runtime/samples/if-block-or/main.svelte
+++ b/test/runtime/samples/if-block-or/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let a;
+	export let b;
+</script>
+
 {#if a || b}
 	<p>i am visible</p>
 {/if}
diff --git a/test/runtime/samples/if-block/main.svelte b/test/runtime/samples/if-block/main.svelte
index a54acecb15..828ea910fc 100644
--- a/test/runtime/samples/if-block/main.svelte
+++ b/test/runtime/samples/if-block/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let visible;
+</script>
+
 {#if visible}
 	<p>i am visible</p>
 {/if}
diff --git a/test/runtime/samples/if-in-keyed-each/main.svelte b/test/runtime/samples/if-in-keyed-each/main.svelte
index 65ebcdd330..4cf877b3d7 100644
--- a/test/runtime/samples/if-in-keyed-each/main.svelte
+++ b/test/runtime/samples/if-in-keyed-each/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let items;
+</script>
+
 <ul>
 	{#each items as item (item.id)}
 		{#if item.id}
diff --git a/test/runtime/samples/inline-expressions/main.svelte b/test/runtime/samples/inline-expressions/main.svelte
index e5da1ff551..f51d901912 100644
--- a/test/runtime/samples/inline-expressions/main.svelte
+++ b/test/runtime/samples/inline-expressions/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let a;
+	export let b;
+</script>
+
 <p>{a} + {b} = {a + b}</p>
diff --git a/test/runtime/samples/names-deconflicted-nested/main.svelte b/test/runtime/samples/names-deconflicted-nested/main.svelte
index 4d0b8ae1b6..4942ec5fbc 100644
--- a/test/runtime/samples/names-deconflicted-nested/main.svelte
+++ b/test/runtime/samples/names-deconflicted-nested/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let array;
+</script>
+
 {#each array as row, i}
 	<div>
 		{#each row as cell, j}
diff --git a/test/runtime/samples/names-deconflicted/Widget.svelte b/test/runtime/samples/names-deconflicted/Widget.svelte
index a004758196..a8cc274a6f 100644
--- a/test/runtime/samples/names-deconflicted/Widget.svelte
+++ b/test/runtime/samples/names-deconflicted/Widget.svelte
@@ -1 +1,6 @@
+<script>
+	export let index;
+	export let widget;
+</script>
+
 <p>{index + 1}: {widget.name}</p>
diff --git a/test/runtime/samples/option-without-select/main.svelte b/test/runtime/samples/option-without-select/main.svelte
index b0156e95c5..69dd8b229e 100644
--- a/test/runtime/samples/option-without-select/main.svelte
+++ b/test/runtime/samples/option-without-select/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <option value='{foo}'>{foo}</option>
\ No newline at end of file
diff --git a/test/runtime/samples/paren-wrapped-expressions/main.svelte b/test/runtime/samples/paren-wrapped-expressions/main.svelte
index f76ea96950..44398b3bd0 100644
--- a/test/runtime/samples/paren-wrapped-expressions/main.svelte
+++ b/test/runtime/samples/paren-wrapped-expressions/main.svelte
@@ -1,3 +1,9 @@
+<script>
+	export let a;
+	export let b;
+	export let c;
+</script>
+
 <span>{ (a) }</span>
 <span class='{ (a) }'></span>
 {#if (b) }
diff --git a/test/runtime/samples/prop-not-action/Nested.svelte b/test/runtime/samples/prop-not-action/Nested.svelte
index b1029d2ad5..7c8cd59210 100644
--- a/test/runtime/samples/prop-not-action/Nested.svelte
+++ b/test/runtime/samples/prop-not-action/Nested.svelte
@@ -1 +1,5 @@
+<script>
+	export let user;
+</script>
+
 <h1>Hello {user.name}!</h1>
\ No newline at end of file
diff --git a/test/runtime/samples/props/RenderProps.svelte b/test/runtime/samples/props/RenderProps.svelte
index ce3fc9abce..7026545f00 100644
--- a/test/runtime/samples/props/RenderProps.svelte
+++ b/test/runtime/samples/props/RenderProps.svelte
@@ -1 +1,3 @@
+<script></script>
+
 <p>{JSON.stringify($$props)}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/raw-anchor-first-child/main.svelte b/test/runtime/samples/raw-anchor-first-child/main.svelte
index 1c882f4e7d..39d7937a7d 100644
--- a/test/runtime/samples/raw-anchor-first-child/main.svelte
+++ b/test/runtime/samples/raw-anchor-first-child/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let raw;
+	export let maybe;
+</script>
+
 <div>{@html raw}{#if maybe}after{/if}</div>
diff --git a/test/runtime/samples/raw-anchor-first-last-child/main.svelte b/test/runtime/samples/raw-anchor-first-last-child/main.svelte
index 610d1f3141..205abb75e8 100644
--- a/test/runtime/samples/raw-anchor-first-last-child/main.svelte
+++ b/test/runtime/samples/raw-anchor-first-last-child/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let raw;
+</script>
+
 <div>{@html raw}</div>
diff --git a/test/runtime/samples/raw-anchor-last-child/main.svelte b/test/runtime/samples/raw-anchor-last-child/main.svelte
index 4267bfa933..48a6b9e5b6 100644
--- a/test/runtime/samples/raw-anchor-last-child/main.svelte
+++ b/test/runtime/samples/raw-anchor-last-child/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let maybe;
+	export let raw;
+</script>
+
 <div>{#if maybe}after{/if}{@html raw}</div>
diff --git a/test/runtime/samples/raw-anchor-next-previous-sibling/main.svelte b/test/runtime/samples/raw-anchor-next-previous-sibling/main.svelte
index 701d85c2b2..963ce1bd91 100644
--- a/test/runtime/samples/raw-anchor-next-previous-sibling/main.svelte
+++ b/test/runtime/samples/raw-anchor-next-previous-sibling/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let raw;
+</script>
+
 before<br>{@html raw}<br>after
diff --git a/test/runtime/samples/raw-anchor-next-sibling/main.svelte b/test/runtime/samples/raw-anchor-next-sibling/main.svelte
index 24472a362e..5add0fc7d3 100644
--- a/test/runtime/samples/raw-anchor-next-sibling/main.svelte
+++ b/test/runtime/samples/raw-anchor-next-sibling/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let raw;
+	export let maybe;
+</script>
+
 before<br>{@html raw}{#if maybe}after{/if}
diff --git a/test/runtime/samples/raw-anchor-previous-sibling/main.svelte b/test/runtime/samples/raw-anchor-previous-sibling/main.svelte
index 24472a362e..5add0fc7d3 100644
--- a/test/runtime/samples/raw-anchor-previous-sibling/main.svelte
+++ b/test/runtime/samples/raw-anchor-previous-sibling/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let raw;
+	export let maybe;
+</script>
+
 before<br>{@html raw}{#if maybe}after{/if}
diff --git a/test/runtime/samples/raw-mustaches-preserved/main.svelte b/test/runtime/samples/raw-mustaches-preserved/main.svelte
index 610d1f3141..205abb75e8 100644
--- a/test/runtime/samples/raw-mustaches-preserved/main.svelte
+++ b/test/runtime/samples/raw-mustaches-preserved/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let raw;
+</script>
+
 <div>{@html raw}</div>
diff --git a/test/runtime/samples/raw-mustaches/main.svelte b/test/runtime/samples/raw-mustaches/main.svelte
index 28c657e9a6..e6b2ed57df 100644
--- a/test/runtime/samples/raw-mustaches/main.svelte
+++ b/test/runtime/samples/raw-mustaches/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let raw;
+</script>
+
 before{@html raw}after
diff --git a/test/runtime/samples/select-bind-array/main.svelte b/test/runtime/samples/select-bind-array/main.svelte
index a863eec89e..4f8a3dda02 100644
--- a/test/runtime/samples/select-bind-array/main.svelte
+++ b/test/runtime/samples/select-bind-array/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let items;
+</script>
+
 <select bind:value={foo}>
 	{#each items as item}
 		<option value='{item.id}'>{item.id}</option>
diff --git a/test/runtime/samples/select-bind-in-array/main.svelte b/test/runtime/samples/select-bind-in-array/main.svelte
index 51f33c7611..29a67b0a8b 100644
--- a/test/runtime/samples/select-bind-in-array/main.svelte
+++ b/test/runtime/samples/select-bind-in-array/main.svelte
@@ -1,3 +1,7 @@
+<script>
+  export let items;
+</script>
+
 {#each items as item}
   <select bind:value={item.id}>
     <option value='a'>a</option>
diff --git a/test/runtime/samples/select-one-way-bind-object/main.svelte b/test/runtime/samples/select-one-way-bind-object/main.svelte
index f5422990d3..c940b3a50e 100644
--- a/test/runtime/samples/select-one-way-bind-object/main.svelte
+++ b/test/runtime/samples/select-one-way-bind-object/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let items;
+</script>
+
 <select value="{foo}">
 	<option value='{items[0]}'>a</option>
 	<option value='{items[1]}'>b</option>
diff --git a/test/runtime/samples/select-one-way-bind/main.svelte b/test/runtime/samples/select-one-way-bind/main.svelte
index 9764039c25..21ba398e4c 100644
--- a/test/runtime/samples/select-one-way-bind/main.svelte
+++ b/test/runtime/samples/select-one-way-bind/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 <select value="{foo}">
 	<option>a</option>
 	<option>b</option>
diff --git a/test/runtime/samples/select/main.svelte b/test/runtime/samples/select/main.svelte
index 294954edd0..837d0e0fd9 100644
--- a/test/runtime/samples/select/main.svelte
+++ b/test/runtime/samples/select/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let item;
+</script>
+
 <select>
 	<option value="{item.key}">{item.name}</option>
 	<option value="b">Two</option>
diff --git a/test/runtime/samples/self-reference-tree/main.svelte b/test/runtime/samples/self-reference-tree/main.svelte
index 6663cf9533..132f13e859 100644
--- a/test/runtime/samples/self-reference-tree/main.svelte
+++ b/test/runtime/samples/self-reference-tree/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let file;
+</script>
+
 <article class='file {file.type}'>
 	<span class='name'>{file.name}</span>
 
diff --git a/test/runtime/samples/self-reference/main.svelte b/test/runtime/samples/self-reference/main.svelte
index e5581203c3..7c89fc0506 100644
--- a/test/runtime/samples/self-reference/main.svelte
+++ b/test/runtime/samples/self-reference/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let depth;
+</script>
+
 <span>{depth}</span>
 {#if depth > 0}
 	<svelte:self depth='{depth - 1}'/>
diff --git a/test/runtime/samples/set-after-destroy/main.svelte b/test/runtime/samples/set-after-destroy/main.svelte
index 44da74a72d..11d49265a3 100644
--- a/test/runtime/samples/set-after-destroy/main.svelte
+++ b/test/runtime/samples/set-after-destroy/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let x;
+</script>
+
 <div>{x}</div>
\ No newline at end of file
diff --git a/test/runtime/samples/set-null-text-node/main.svelte b/test/runtime/samples/set-null-text-node/main.svelte
index bf9a9ffe59..825f9c7462 100644
--- a/test/runtime/samples/set-null-text-node/main.svelte
+++ b/test/runtime/samples/set-null-text-node/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 foo is {foo}
\ No newline at end of file
diff --git a/test/runtime/samples/sigil-component-attribute/Widget.svelte b/test/runtime/samples/sigil-component-attribute/Widget.svelte
index 5964bdac68..2ba74ee888 100644
--- a/test/runtime/samples/sigil-component-attribute/Widget.svelte
+++ b/test/runtime/samples/sigil-component-attribute/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let value;
+</script>
+
 <div>{value}</div>
diff --git a/test/runtime/samples/spread-component-dynamic-undefined/main.svelte b/test/runtime/samples/spread-component-dynamic-undefined/main.svelte
index 435cacaa53..69abad13e6 100644
--- a/test/runtime/samples/spread-component-dynamic-undefined/main.svelte
+++ b/test/runtime/samples/spread-component-dynamic-undefined/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let props;
+</script>
+
 <svelte:component this={undefined} {...props} />
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component-dynamic/Foo.svelte b/test/runtime/samples/spread-component-dynamic/Foo.svelte
index e7884fdfee..4cffe5d3ce 100644
--- a/test/runtime/samples/spread-component-dynamic/Foo.svelte
+++ b/test/runtime/samples/spread-component-dynamic/Foo.svelte
@@ -1 +1,5 @@
+<script>
+	export let a;
+</script>
+
 <p>a: {a}</p>
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component-multiple-dependencies/Widget.svelte b/test/runtime/samples/spread-component-multiple-dependencies/Widget.svelte
index ab2d2d0242..373bf23f51 100644
--- a/test/runtime/samples/spread-component-multiple-dependencies/Widget.svelte
+++ b/test/runtime/samples/spread-component-multiple-dependencies/Widget.svelte
@@ -1 +1,6 @@
+<script>
+	export let foo;
+	export let baz;
+</script>
+
 {foo} {baz}
diff --git a/test/runtime/samples/spread-component-with-bind/Widget.svelte b/test/runtime/samples/spread-component-with-bind/Widget.svelte
index 7d9b108a1a..63d78cdcb5 100644
--- a/test/runtime/samples/spread-component-with-bind/Widget.svelte
+++ b/test/runtime/samples/spread-component-with-bind/Widget.svelte
@@ -1,2 +1,6 @@
+<script>
+	export let value;
+</script>
+
 <p>{value}</p>
 <input bind:value/>
\ No newline at end of file
diff --git a/test/runtime/samples/spread-component/Widget.svelte b/test/runtime/samples/spread-component/Widget.svelte
index a60afb741c..40de25bb55 100644
--- a/test/runtime/samples/spread-component/Widget.svelte
+++ b/test/runtime/samples/spread-component/Widget.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let foo;
+	export let baz;
+	export let qux;
+	export let quux;
+</script>
+
 <p>foo: {foo}</p>
 <p>baz: {baz} ({typeof baz})</p>
 <p>qux: {qux}</p>
diff --git a/test/runtime/samples/spread-each-component/Nested.svelte b/test/runtime/samples/spread-each-component/Nested.svelte
index fb0f25d2e7..c599d10913 100644
--- a/test/runtime/samples/spread-each-component/Nested.svelte
+++ b/test/runtime/samples/spread-each-component/Nested.svelte
@@ -1 +1,6 @@
+<script>
+	export let a;
+	export let b;
+</script>
+
 <div data-a={a} data-b={b}></div>
\ No newline at end of file
diff --git a/test/runtime/samples/spread-each-element/main.svelte b/test/runtime/samples/spread-each-element/main.svelte
index 99ae4eeece..086ac22b6a 100644
--- a/test/runtime/samples/spread-each-element/main.svelte
+++ b/test/runtime/samples/spread-each-element/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 {#each things as thing}
 	<div {...thing}></div>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/spread-element-boolean/main.svelte b/test/runtime/samples/spread-element-boolean/main.svelte
index 5cd4df8766..7fa26ed3ab 100644
--- a/test/runtime/samples/spread-element-boolean/main.svelte
+++ b/test/runtime/samples/spread-element-boolean/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let props;
+</script>
+
 <button {...props} >click me</button>
\ No newline at end of file
diff --git a/test/runtime/samples/spread-element-input/main.svelte b/test/runtime/samples/spread-element-input/main.svelte
index 736444749b..c933863b98 100644
--- a/test/runtime/samples/spread-element-input/main.svelte
+++ b/test/runtime/samples/spread-element-input/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let value;
+	export let props;
+</script>
+
 <input bind:value {...props}>
\ No newline at end of file
diff --git a/test/runtime/samples/spread-element-multiple/main.svelte b/test/runtime/samples/spread-element-multiple/main.svelte
index 97272e6946..a71100306e 100644
--- a/test/runtime/samples/spread-element-multiple/main.svelte
+++ b/test/runtime/samples/spread-element-multiple/main.svelte
@@ -1 +1,7 @@
+<script>
+	export let a;
+	export let c;
+	export let d;
+</script>
+
 <div {...a} data-b="b" {...c} data-d={d} >test</div>
\ No newline at end of file
diff --git a/test/runtime/samples/spread-own-props/Widget.svelte b/test/runtime/samples/spread-own-props/Widget.svelte
index a60afb741c..40de25bb55 100644
--- a/test/runtime/samples/spread-own-props/Widget.svelte
+++ b/test/runtime/samples/spread-own-props/Widget.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let foo;
+	export let baz;
+	export let qux;
+	export let quux;
+</script>
+
 <p>foo: {foo}</p>
 <p>baz: {baz} ({typeof baz})</p>
 <p>qux: {qux}</p>
diff --git a/test/runtime/samples/state-deconflicted/main.svelte b/test/runtime/samples/state-deconflicted/main.svelte
index 12ff80a0ed..a03a5a7919 100644
--- a/test/runtime/samples/state-deconflicted/main.svelte
+++ b/test/runtime/samples/state-deconflicted/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let state;
+	export let states;
+</script>
+
 <p>Current state: {state}</p>
 
 <ul>
diff --git a/test/runtime/samples/store-auto-subscribe-implicit/main.svelte b/test/runtime/samples/store-auto-subscribe-implicit/main.svelte
index 1c4fdddad3..849de85acf 100644
--- a/test/runtime/samples/store-auto-subscribe-implicit/main.svelte
+++ b/test/runtime/samples/store-auto-subscribe-implicit/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let count;
+</script>
+
 <button on:click="{() => count.update(n => n + 1)}">count {$count}</button>
\ No newline at end of file
diff --git a/test/runtime/samples/store-contextual/main.svelte b/test/runtime/samples/store-contextual/main.svelte
index f8403eded4..3687271fdd 100644
--- a/test/runtime/samples/store-contextual/main.svelte
+++ b/test/runtime/samples/store-contextual/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let todos;
+</script>
+
 {#each todos as todo}
 	<label>
 		<input type=checkbox on:change={e => todo.update(t => ({ done: e.target.checked, text: t.text }))}>
diff --git a/test/runtime/samples/svg-each-block-anchor/main.svelte b/test/runtime/samples/svg-each-block-anchor/main.svelte
index f9e4a57bd8..fcb0170b6e 100644
--- a/test/runtime/samples/svg-each-block-anchor/main.svelte
+++ b/test/runtime/samples/svg-each-block-anchor/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let foo;
+	export let bar;
+</script>
+
 <svg>
 	{#each foo as x}
 		<g class='foo'></g>
diff --git a/test/runtime/samples/svg-multiple/main.svelte b/test/runtime/samples/svg-multiple/main.svelte
index 93b980cf89..454f486fd1 100644
--- a/test/runtime/samples/svg-multiple/main.svelte
+++ b/test/runtime/samples/svg-multiple/main.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let x;
+	export let y;
+	export let width;
+	export let height;
+</script>
+
 <svg>
 	<rect x='{x}' y='{y}' width='{width}' height='{height}'/>
 </svg>
diff --git a/test/runtime/samples/svg-with-style/main.svelte b/test/runtime/samples/svg-with-style/main.svelte
index 2d5df24f38..424834134e 100644
--- a/test/runtime/samples/svg-with-style/main.svelte
+++ b/test/runtime/samples/svg-with-style/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let x;
+</script>
+
 <svg>
 	<circle cx=50 cy=50 r=50/>
 	<circle class='foo' cx=150 cy=50 r=50/>
diff --git a/test/runtime/samples/svg-xmlns/main.svelte b/test/runtime/samples/svg-xmlns/main.svelte
index 34d5bae10b..a415a12afc 100644
--- a/test/runtime/samples/svg-xmlns/main.svelte
+++ b/test/runtime/samples/svg-xmlns/main.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let x;
+	export let y;
+	export let width;
+	export let height;
+</script>
+
 <svg xmlns='http://www.w3.org/2000/svg'>
 	<rect x='{x}' y='{y}' width='{width}' height='{height}'/>
 </svg>
diff --git a/test/runtime/samples/svg/main.svelte b/test/runtime/samples/svg/main.svelte
index 22f7abf20c..25abd331a4 100644
--- a/test/runtime/samples/svg/main.svelte
+++ b/test/runtime/samples/svg/main.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let x;
+	export let y;
+	export let width;
+	export let height;
+</script>
+
 <svg>
 	<rect x='{x}' y='{y}' width='{width}' height='{height}'/>
 </svg>
diff --git a/test/runtime/samples/textarea-children/main.svelte b/test/runtime/samples/textarea-children/main.svelte
index 6cc3072e5c..6579577ad9 100644
--- a/test/runtime/samples/textarea-children/main.svelte
+++ b/test/runtime/samples/textarea-children/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 <textarea>
 	<p>not actually an element. {foo}</p>
 </textarea>
\ No newline at end of file
diff --git a/test/runtime/samples/textarea-value/main.svelte b/test/runtime/samples/textarea-value/main.svelte
index 9ba2506e48..7eaf783f7f 100644
--- a/test/runtime/samples/textarea-value/main.svelte
+++ b/test/runtime/samples/textarea-value/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <textarea value='{foo}'/>
\ No newline at end of file
diff --git a/test/runtime/samples/transition-js-nested-each-keyed-2/Widget.svelte b/test/runtime/samples/transition-js-nested-each-keyed-2/Widget.svelte
index 9b57a5905c..d24d136080 100644
--- a/test/runtime/samples/transition-js-nested-each-keyed-2/Widget.svelte
+++ b/test/runtime/samples/transition-js-nested-each-keyed-2/Widget.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let things;
+</script>
+
 {#each things as thing (thing)}
   <div></div>
 {/each}
diff --git a/test/runtime/samples/whitespace-each-block/main.svelte b/test/runtime/samples/whitespace-each-block/main.svelte
index cf8511fe39..cdb3a6baec 100644
--- a/test/runtime/samples/whitespace-each-block/main.svelte
+++ b/test/runtime/samples/whitespace-each-block/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let characters;
+</script>
+
 {#each characters as char}
 	<span>{char} </span>
 {/each}
\ No newline at end of file
diff --git a/test/runtime/samples/whitespace-list/main.svelte b/test/runtime/samples/whitespace-list/main.svelte
index c66f7344e5..2fdec4d6a3 100644
--- a/test/runtime/samples/whitespace-list/main.svelte
+++ b/test/runtime/samples/whitespace-list/main.svelte
@@ -1,3 +1,9 @@
+<script>
+	export let one;
+	export let two;
+	export let three;
+</script>
+
 <ul>
 	<li>{one}</li>
 	<li>{two}</li>
diff --git a/test/runtime/samples/whitespace-normal/main.svelte b/test/runtime/samples/whitespace-normal/main.svelte
index c845c255dd..f5cf8316d4 100644
--- a/test/runtime/samples/whitespace-normal/main.svelte
+++ b/test/runtime/samples/whitespace-normal/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let name;
+</script>
+
 <h1>Hello <strong>{name}! </strong><span>How are you?</span></h1>
diff --git a/test/runtime/samples/window-bind-scroll-update/main.svelte b/test/runtime/samples/window-bind-scroll-update/main.svelte
index 107ebeef8f..8f00d15089 100644
--- a/test/runtime/samples/window-bind-scroll-update/main.svelte
+++ b/test/runtime/samples/window-bind-scroll-update/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let scrollY;
+</script>
+
 <svelte:window bind:scrollY/>
 
 <div style='width: 100%; height: 9999px;'></div>
\ No newline at end of file
diff --git a/test/runtime/samples/window-binding-multiple-handlers/main.svelte b/test/runtime/samples/window-binding-multiple-handlers/main.svelte
index 8b28d53a9f..7601d745e4 100644
--- a/test/runtime/samples/window-binding-multiple-handlers/main.svelte
+++ b/test/runtime/samples/window-binding-multiple-handlers/main.svelte
@@ -1,2 +1,7 @@
+<script>
+	export let width;
+	export let height;
+</script>
+
 <svelte:window bind:innerWidth={width} bind:innerHeight={height}/>
 <button on:click={() => {}}>Click</button>
diff --git a/test/runtime/samples/window-binding-resize/main.svelte b/test/runtime/samples/window-binding-resize/main.svelte
index e156772be7..405f4e6e23 100644
--- a/test/runtime/samples/window-binding-resize/main.svelte
+++ b/test/runtime/samples/window-binding-resize/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let width;
+	export let height;
+</script>
+
 <svelte:window bind:innerWidth={width} bind:innerHeight={height}/>
 
 <div>{width}x{height}</div>
\ No newline at end of file
diff --git a/test/runtime/samples/window-event-context/main.svelte b/test/runtime/samples/window-event-context/main.svelte
index f0e37fd094..4f9dc24ba1 100644
--- a/test/runtime/samples/window-event-context/main.svelte
+++ b/test/runtime/samples/window-event-context/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 <svelte:window on:click='{() => foo = !foo}'/>
 
 {foo}
\ No newline at end of file
diff --git a/test/runtime/samples/window-event/main.svelte b/test/runtime/samples/window-event/main.svelte
index 4bf0eee526..1aa84a0890 100644
--- a/test/runtime/samples/window-event/main.svelte
+++ b/test/runtime/samples/window-event/main.svelte
@@ -1,3 +1,8 @@
+<script>
+	export let width;
+	export let height;
+</script>
+
 <svelte:window on:resize='{() => width = this.innerWidth, height = this.innerHeight}'/>
 
 <div>{width}x{height}</div>
\ No newline at end of file
diff --git a/test/server-side-rendering/samples/attribute-dynamic/main.svelte b/test/server-side-rendering/samples/attribute-dynamic/main.svelte
index 1528a49478..07cfce149a 100644
--- a/test/server-side-rendering/samples/attribute-dynamic/main.svelte
+++ b/test/server-side-rendering/samples/attribute-dynamic/main.svelte
@@ -1 +1,6 @@
+<script>
+	export let font;
+	export let color;
+</script>
+
 <div style='font-family: {font}; color: {color};'>{color} {font}</div>
diff --git a/test/server-side-rendering/samples/component-data-dynamic/Widget.svelte b/test/server-side-rendering/samples/component-data-dynamic/Widget.svelte
index a60afb741c..40de25bb55 100644
--- a/test/server-side-rendering/samples/component-data-dynamic/Widget.svelte
+++ b/test/server-side-rendering/samples/component-data-dynamic/Widget.svelte
@@ -1,3 +1,10 @@
+<script>
+	export let foo;
+	export let baz;
+	export let qux;
+	export let quux;
+</script>
+
 <p>foo: {foo}</p>
 <p>baz: {baz} ({typeof baz})</p>
 <p>qux: {qux}</p>
diff --git a/test/server-side-rendering/samples/component-data-empty/Widget.svelte b/test/server-side-rendering/samples/component-data-empty/Widget.svelte
index 0fbf16cc4e..c94758843a 100644
--- a/test/server-side-rendering/samples/component-data-empty/Widget.svelte
+++ b/test/server-side-rendering/samples/component-data-empty/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <p>foo: '{foo}'</p>
diff --git a/test/server-side-rendering/samples/component-refs-and-attributes/Widget.svelte b/test/server-side-rendering/samples/component-refs-and-attributes/Widget.svelte
index c35a27b8e6..c5be3ed3af 100644
--- a/test/server-side-rendering/samples/component-refs-and-attributes/Widget.svelte
+++ b/test/server-side-rendering/samples/component-refs-and-attributes/Widget.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <p>{foo}</p>
diff --git a/test/server-side-rendering/samples/dynamic-text-escaped/main.svelte b/test/server-side-rendering/samples/dynamic-text-escaped/main.svelte
index 2146372482..5acf558f3b 100644
--- a/test/server-side-rendering/samples/dynamic-text-escaped/main.svelte
+++ b/test/server-side-rendering/samples/dynamic-text-escaped/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 {foo}
diff --git a/test/server-side-rendering/samples/dynamic-text/main.svelte b/test/server-side-rendering/samples/dynamic-text/main.svelte
index 2146372482..5acf558f3b 100644
--- a/test/server-side-rendering/samples/dynamic-text/main.svelte
+++ b/test/server-side-rendering/samples/dynamic-text/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 {foo}
diff --git a/test/server-side-rendering/samples/each-block/main.svelte b/test/server-side-rendering/samples/each-block/main.svelte
index 96e46c9253..ef1c5f0838 100644
--- a/test/server-side-rendering/samples/each-block/main.svelte
+++ b/test/server-side-rendering/samples/each-block/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let animals;
+</script>
+
 {#each animals as animal, i}
 	<p>{i + 1}: {animal}</p>
 {/each}
diff --git a/test/server-side-rendering/samples/entities/main.svelte b/test/server-side-rendering/samples/entities/main.svelte
index 2146372482..5acf558f3b 100644
--- a/test/server-side-rendering/samples/entities/main.svelte
+++ b/test/server-side-rendering/samples/entities/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 {foo}
diff --git a/test/server-side-rendering/samples/head-title/main.svelte b/test/server-side-rendering/samples/head-title/main.svelte
index c14a1e9c4e..a5ea171406 100644
--- a/test/server-side-rendering/samples/head-title/main.svelte
+++ b/test/server-side-rendering/samples/head-title/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let adjective;
+</script>
+
 <svelte:head>
 	<title>a {adjective} title</title>
 </svelte:head>
diff --git a/test/server-side-rendering/samples/if-block-false/main.svelte b/test/server-side-rendering/samples/if-block-false/main.svelte
index 23b4b0f7ed..45b54f74da 100644
--- a/test/server-side-rendering/samples/if-block-false/main.svelte
+++ b/test/server-side-rendering/samples/if-block-false/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 {#if foo}
 	<p>foo is true</p>
 {/if}
diff --git a/test/server-side-rendering/samples/if-block-true/main.svelte b/test/server-side-rendering/samples/if-block-true/main.svelte
index 23b4b0f7ed..45b54f74da 100644
--- a/test/server-side-rendering/samples/if-block-true/main.svelte
+++ b/test/server-side-rendering/samples/if-block-true/main.svelte
@@ -1,3 +1,7 @@
+<script>
+	export let foo;
+</script>
+
 {#if foo}
 	<p>foo is true</p>
 {/if}
diff --git a/test/server-side-rendering/samples/raw-mustaches/main.svelte b/test/server-side-rendering/samples/raw-mustaches/main.svelte
index 28c657e9a6..e6b2ed57df 100644
--- a/test/server-side-rendering/samples/raw-mustaches/main.svelte
+++ b/test/server-side-rendering/samples/raw-mustaches/main.svelte
@@ -1 +1,5 @@
+<script>
+	export let raw;
+</script>
+
 before{@html raw}after