diff --git a/lib/spack/spack/test/spec_syntax.py b/lib/spack/spack/test/spec_syntax.py
index 7253eb6615c..98b8bec8f9a 100644
--- a/lib/spack/spack/test/spec_syntax.py
+++ b/lib/spack/spack/test/spec_syntax.py
@@ -737,6 +737,7 @@ def _specfile_for(spec_str, filename):
                 Token(SpecTokens.KEY_VALUE_PAIR, "target=x86_64"),
             ],
             "mvapich %gcc languages:='c,c++' arch=None-None-x86_64",
+        ),
         # Test conditional dependencies
         (
             "foo ^[when='%c' virtuals=c]gcc",