anchor.diff:      });
   
       test('bad FUNCTION_SIGNATURE_TYPE', () async {
  -      final proc = await startServerTest(shouldFail: true, env: {
  -        'FUNCTION_SIGNATURE_TYPE': 'bob',
  -      });
  +      final proc = await startServerTest(
  +        shouldFail: true,
  +        env: {
  +          'FUNCTION_SIGNATURE_TYPE': 'bob',
  +        },
  +      );
   
         await expectLater(
           proc.stderr,
  
positive.code:     });
  
      test('bad PORT', () async {
        final proc = await startServerTest(shouldFail: true, env: {
          'PORT': 'bob',
        });
  
        await expectLater(
          proc.stderr,
  
negative.code:   group('environment', () {
      test('good environment', () async {
        const port = 8888;
        final proc = await startServerTest(
          expectedListeningPort: port,
          env: {
            'PORT': port.toString(),
          },
        );
  
        final response = await get('http://localhost:$port');
        expect(response.statusCode, 200);
  