diff --git a/packages/svelte/src/internal/shared/attributes.js b/packages/svelte/src/internal/shared/attributes.js
index a96e71ff6f..4ad550e8d6 100644
--- a/packages/svelte/src/internal/shared/attributes.js
+++ b/packages/svelte/src/internal/shared/attributes.js
@@ -22,11 +22,11 @@ const replacements = {
  * @returns {string}
  */
 export function attr(name, value, is_boolean = false) {
-	if (value == null || (!value && is_boolean)) return '';
 	// attribute hidden for values other than "until-found" behaves like a boolean attribute
 	if (name === 'hidden' && value !== 'until-found') {
 		is_boolean = true;
 	}
+	if (value == null || (!value && is_boolean)) return '';
 	const normalized = (name in replacements && replacements[name].get(value)) || value;
 	const assignment = is_boolean ? '' : `="${escape_html(normalized, true)}"`;
 	return ` ${name}${assignment}`;
diff --git a/packages/svelte/tests/runtime-runes/samples/attribute-spread-hidden-2/_expected.html b/packages/svelte/tests/server-side-rendering/samples/attribute-spread-hidden/_expected.html
similarity index 100%
rename from packages/svelte/tests/runtime-runes/samples/attribute-spread-hidden-2/_expected.html
rename to packages/svelte/tests/server-side-rendering/samples/attribute-spread-hidden/_expected.html
diff --git a/packages/svelte/tests/runtime-runes/samples/attribute-spread-hidden-2/main.svelte b/packages/svelte/tests/server-side-rendering/samples/attribute-spread-hidden/main.svelte
similarity index 100%
rename from packages/svelte/tests/runtime-runes/samples/attribute-spread-hidden-2/main.svelte
rename to packages/svelte/tests/server-side-rendering/samples/attribute-spread-hidden/main.svelte