diff --git a/package.json b/package.json
index 7106e60d69..4c9b5614be 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "types": "types/runtime",
   "scripts": {
     "test": "mocha --opts mocha.opts",
-    "test:unit": "mocha --require sucrase/register --recursive ./**/__test__.ts",
+    "test:unit": "mocha --require sucrase/register --recursive src/**/__test__.ts",
     "quicktest": "mocha --opts mocha.opts",
     "precoverage": "c8 mocha --opts mocha.coverage.opts",
     "coverage": "c8 report --reporter=text-lcov > coverage.lcov && c8 report --reporter=html",
diff --git a/src/compiler/compile/index.ts b/src/compiler/compile/index.ts
index 896f235c61..973847a1b9 100644
--- a/src/compiler/compile/index.ts
+++ b/src/compiler/compile/index.ts
@@ -6,6 +6,7 @@ import render_ssr from './render-ssr/index';
 import { CompileOptions, Warning } from '../interfaces';
 import Component from './Component';
 import fuzzymatch from '../utils/fuzzymatch';
+import { get_name_from_filename } from './utils/get_name_from_filename';
 
 const valid_options = [
 	'format',
@@ -55,33 +56,6 @@ function validate_options(options: CompileOptions, warnings: Warning[]) {
 	}
 }
 
-function get_name(filename: string) {
-	if (!filename) return null;
-	// eslint-disable-next-line no-useless-escape
-	const parts = filename.split(/[\/\\]/);
-
-	if (parts.length > 1) {
-		const index_match = parts[parts.length - 1].match(/^index(\.\w+)/);
-		if (index_match) {
-			parts.pop();
-			parts[parts.length - 1] += index_match[1];
-		}
-	}
-
-	const base = parts.pop()
-		.replace(/\.[^.]+$/, "")
-		.replace(/[^a-zA-Z_$0-9]+/g, '_')
-		.replace(/^_/, '')
-		.replace(/_$/, '')
-		.replace(/^(\d)/, '_$1');
-
-	if (!base) {
-		throw new Error(`Could not derive component name from file ${filename}`);
-	}
-
-	return base[0].toUpperCase() + base.slice(1);
-}
-
 export default function compile(source: string, options: CompileOptions = {}) {
 	options = assign({ generate: 'dom', dev: false }, options);
 
@@ -98,7 +72,7 @@ export default function compile(source: string, options: CompileOptions = {}) {
 	const component = new Component(
 		ast,
 		source,
-		options.name || get_name(options.filename) || 'Component',
+		options.name || get_name_from_filename(options.filename) || 'Component',
 		options,
 		stats,
 		warnings
diff --git a/src/compiler/compile/utils/__test__.ts b/src/compiler/compile/utils/__test__.ts
index 7a8b5a6fd7..b5bc5d8ea8 100644
--- a/src/compiler/compile/utils/__test__.ts
+++ b/src/compiler/compile/utils/__test__.ts
@@ -1,6 +1,7 @@
 import * as assert from 'assert';
 import deindent from './deindent';
 import CodeBuilder from './CodeBuilder';
+import get_name_from_filename from './get_name_from_filename';
 
 describe('deindent', () => {
 	it('deindents a simple string', () => {
@@ -164,3 +165,17 @@ describe('CodeBuilder', () => {
 		);
 	});
 });
+
+describe('get_name_from_filename', () => {
+	it('uses the basename', () => {
+		assert.equal(get_name_from_filename('path/to/Widget.svelte'), 'Widget');
+	});
+
+	it('uses the directory name, if basename is index', () => {
+		assert.equal(get_name_from_filename('path/to/Widget/index.svelte'), 'Widget');
+	});
+
+	it('handles unusual filenames', () => {
+		assert.equal(get_name_from_filename('path/to/[...parts].svelte'), 'Parts');
+	});
+});
diff --git a/src/compiler/compile/utils/get_name_from_filename.ts b/src/compiler/compile/utils/get_name_from_filename.ts
new file mode 100644
index 0000000000..19c781825c
--- /dev/null
+++ b/src/compiler/compile/utils/get_name_from_filename.ts
@@ -0,0 +1,26 @@
+export default function get_name_from_filename(filename: string) {
+	if (!filename) return null;
+	// eslint-disable-next-line no-useless-escape
+	const parts = filename.split(/[\/\\]/);
+
+	if (parts.length > 1) {
+		const index_match = parts[parts.length - 1].match(/^index(\.\w+)/);
+		if (index_match) {
+			parts.pop();
+			parts[parts.length - 1] += index_match[1];
+		}
+	}
+
+	const base = parts.pop()
+		.replace(/\.[^.]+$/, "")
+		.replace(/[^a-zA-Z_$0-9]+/g, '_')
+		.replace(/^_/, '')
+		.replace(/_$/, '')
+		.replace(/^(\d)/, '_$1');
+
+	if (!base) {
+		throw new Error(`Could not derive component name from file ${filename}`);
+	}
+
+	return base[0].toUpperCase() + base.slice(1);
+}
\ No newline at end of file