diff --git a/test/lit.cfg b/test/lit.cfg
index 9847d607b..242861368 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -92,7 +92,7 @@ class LibcxxTestFormat(lit.formats.FileBasedTest):
         return self._evaluate_test(test, lit_config)
 
     def _build(self, exec_path, source_path, compile_only=False):
-        cmd = [self.cxx_under_test, self.cxx_under_test, '-o', exec_path,
+        cmd = [self.cxx_under_test, '-o', exec_path,
                source_path] + self.cpp_flags
         if compile_only:
             cmd += ['-c']