diff --git a/packages/edit-site/src/utils/test/template-part-create.js b/packages/edit-site/src/utils/test/template-part-create.js
new file mode 100644
index 00000000000000..e39513ccf7e4f4
--- /dev/null
+++ b/packages/edit-site/src/utils/test/template-part-create.js
@@ -0,0 +1,63 @@
+/**
+ * Internal dependencies
+ */
+import {
+	getUniqueTemplatePartTitle,
+	getCleanTemplatePartSlug,
+} from '../template-part-create';
+
+describe( 'getUniqueTemplatePartTitle', () => {
+	it( 'should return the title if it is unique', () => {
+		const title = 'My Template Part';
+		const templateParts = [
+			{
+				title: {
+					rendered: 'Template Part With Another Title',
+				},
+			},
+		];
+
+		expect( getUniqueTemplatePartTitle( title, templateParts ) ).toBe(
+			title
+		);
+	} );
+
+	it( 'should return the title with a suffix if it is not unique', () => {
+		const title = 'My Template Part';
+		const templateParts = [
+			{
+				title: {
+					rendered: 'My Template Part',
+				},
+			},
+			{
+				title: {
+					rendered: 'My Template Part 2',
+				},
+			},
+		];
+
+		expect( getUniqueTemplatePartTitle( title, templateParts ) ).toBe(
+			'My Template Part 3'
+		);
+	} );
+} );
+
+describe( 'getCleanTemplatePartSlug', () => {
+	it( 'should return a slug with only latin chars', () => {
+		const title = 'Myɶ Template Partɮ';
+		expect( getCleanTemplatePartSlug( title ) ).toBe( 'my-template-part' );
+	} );
+
+	it( 'should return a slug with only latin chars and numbers', () => {
+		const title = 'My Template Part 2';
+		expect( getCleanTemplatePartSlug( title ) ).toBe(
+			'my-template-part-2'
+		);
+	} );
+
+	it( 'should default the slug to wp-custom-part', () => {
+		const title = '';
+		expect( getCleanTemplatePartSlug( title ) ).toBe( 'wp-custom-part' );
+	} );
+} );