diff --git a/.vscode-test.js b/.vscode-test.js
index a18064b..544c61f 100644
--- a/.vscode-test.js
+++ b/.vscode-test.js
@@ -10,5 +10,5 @@ module.exports = defineConfig([
       ui: "tdd",
       timeout: 20000,
     },
-  }
+  },
 ]);
diff --git a/src/commands/addCommand.ts b/src/commands/addCommand.ts
index 80e89f6..038edf3 100644
--- a/src/commands/addCommand.ts
+++ b/src/commands/addCommand.ts
@@ -172,7 +172,7 @@ async function askDisabledByDefault(cmd: Command): Promise<string | undefined> {
   }
 }
 
-function makeCommandFilename(name: string | undefined) {
+export function makeCommandFilename(name: string | undefined) {
   if (!name) {
     return name;
   }
diff --git a/src/test/suite/addCommand.test.ts b/src/test/suite/addCommand.test.ts
index cc71ae3..e6578db 100644
--- a/src/test/suite/addCommand.test.ts
+++ b/src/test/suite/addCommand.test.ts
@@ -1,25 +1,52 @@
 import * as assert from "assert";
-import { makeCommandFunctionName } from "../../commands/addCommand";
+import { makeCommandFilename, makeCommandFunctionName } from "../../commands/addCommand";
 
 suite("addCommand", () => {
   test("makeCommandFunctionName", () => {
     [
       {
-        in: "test",
+        input: "test",
         should: "Test",
       },
       {
-        in: "Test",
+        input: "Test",
         should: "Test",
       },
       {
-        in: "A Cmd - With Characters",
-        should: "ACmdWithCharacters"
+        input: "A Cmd - With Characters",
+        should: "ACmdWithCharacters",
       },
       {
-        in: "A ~. Cmd",
-        should: "ACmd"
-      }
-    ].forEach((e) => assert.strictEqual(makeCommandFunctionName(e.in), e.should));
+        input: "A ~. Cmd",
+        should: "ACmd",
+      },
+    ].forEach(({ input, should }) => assert.strictEqual(makeCommandFunctionName(input), should));
+
+    [
+      {
+        input: "test",
+        not: "test",
+      },
+    ].forEach(({ input, not }) => assert.notStrictEqual(makeCommandFunctionName(input), not));
+  });
+  test("makeCommandFilename", () => {
+    [
+      {
+        input: "Test A Command",
+        should: "testACommand",
+      },
+      {
+        input: "Test ~ A Command",
+        should: "test~ACommand",
+      },
+      {
+        input: "Test - A - Command",
+        should: "test-A-Command",
+      },
+      {
+        input: "Test . A - Command",
+        should: "test.A-Command",
+      },
+    ].forEach(({ input, should }) => assert.strictEqual(makeCommandFilename(input), should));
   });
 });
diff --git a/src/test/suite/extension.test.ts b/src/test/suite/extension.test.ts
deleted file mode 100644
index 2f671d3..0000000
--- a/src/test/suite/extension.test.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import * as assert from "assert";
-
-// You can import and use all API from the 'vscode' module
-// as well as import your extension to test it
-import * as vscode from "vscode";
-// import * as myExtension from '../../extension';
-
-suite("Extension Test Suite", () => {
-  vscode.window.showInformationMessage("Start all tests.");
-
-  test("Sample test", () => {
-    assert.strictEqual(-1, [1, 2, 3].indexOf(5));
-    assert.strictEqual(-1, [1, 2, 3].indexOf(0));
-  });
-});