diff --git a/src/test/debugger/attach.ptvsd.test.ts b/src/test/debugger/attach.ptvsd.test.ts
index de7a7811e102..900d9fb0d8ff 100644
--- a/src/test/debugger/attach.ptvsd.test.ts
+++ b/src/test/debugger/attach.ptvsd.test.ts
@@ -61,7 +61,7 @@ suite('Debugging - Attach Debugger', () => {
         // Set the path for PTVSD to be picked up.
         // tslint:disable-next-line:no-string-literal
         env['PYTHONPATH'] = PTVSD_PATH;
-        const pythonArgs = ['-m', 'ptvsd', '--host', 'localhost', '--wait', '--port', `${port}`, '--file', fileToDebug.fileToCommandArgument()];
+        const pythonArgs = ['-m', 'ptvsd', '--host', 'localhost', '--wait', '--port', `${port}`, fileToDebug.fileToCommandArgument()];
         proc = spawn(PYTHON_PATH, pythonArgs, { env: env, cwd: path.dirname(fileToDebug) });
         const exited = new Promise(resolve => proc.once('close', resolve));
         await sleep(3000);
diff --git a/src/test/debugger/capabilities.test.ts b/src/test/debugger/capabilities.test.ts
index eef8ecca7347..3e45655c22d7 100644
--- a/src/test/debugger/capabilities.test.ts
+++ b/src/test/debugger/capabilities.test.ts
@@ -89,7 +89,7 @@ suite('Debugging - Capabilities', function () {
         const port = await getFreePort({ host, port: 3000 });
         const env = { ...process.env };
         env.PYTHONPATH = PTVSD_PATH;
-        proc = spawn(PYTHON_PATH, ['-m', 'ptvsd', '--host', 'localhost', '--wait', '--port', `${port}`, '--file', fileToDebug], { cwd: path.dirname(fileToDebug), env });
+        proc = spawn(PYTHON_PATH, ['-m', 'ptvsd', '--host', 'localhost', '--wait', '--port', `${port}`, fileToDebug], { cwd: path.dirname(fileToDebug), env });
         await sleep(3000);
 
         const connected = createDeferred();