diff --git a/python-ConfigArgParse.spec b/python-ConfigArgParse.spec
index 271918e..99d37e9 100644
--- a/python-ConfigArgParse.spec
+++ b/python-ConfigArgParse.spec
@@ -65,7 +65,7 @@ add these features
 %check
 # https://github.com/bw2/ConfigArgParse/issues/146
 export COLUMNS=80
-%pytest -k 'not (test_main or testGlobalInstances or testGlobalInstances_WithName or testConfigOrEnvValueErrors)'
+%pytest -k 'not (test_main or testGlobalInstances or testGlobalInstances_WithName or testConfigOrEnvValueErrors or testMutuallyExclusiveArgs)'
 
 %files %{python_files}
 %doc README.rst