diff --git a/test/test_c_execution.py b/test/test_c_execution.py
index b05b44a8e36f728511192b647d15c26efe3e0132..95f1c499bd7439bda626db5ac8b786b56b61da00 100644
--- a/test/test_c_execution.py
+++ b/test/test_c_execution.py
@@ -331,7 +331,7 @@ def test_missing_compilers():
     # next test that some made up compiler defaults to gcc
     ccomp = CCompiler(cc='foo')
     assert isinstance(ccomp.toolchain, GCCToolchain)
-    assert ccomp.cc = 'gcc'
+    assert ccomp.cc == 'gcc'
 
 
 if __name__ == "__main__":