diff --git a/python-asttokens.spec b/python-asttokens.spec
index 43eb71b..8623a0d 100644
--- a/python-asttokens.spec
+++ b/python-asttokens.spec
@@ -58,7 +58,7 @@ export LC_ALL=en_US.utf8
 %check
 donttest="TestAstroid"
 # Fails in s390x gh#gristlabs/asttokens#159
-donttest+="or test_deep_recursion"
+donttest+=" or test_deep_recursion"
 %pytest -k "not ($donttest)"
 
 %files %{python_files}