diff --git a/cereal.spec b/cereal.spec
index 435aa4c..2781929 100644
--- a/cereal.spec
+++ b/cereal.spec
@@ -49,7 +49,9 @@ pushd %{_target_platform}
 %make_install -C %{_target_platform}
 
 %check
-make -C %{_target_platform} test ARGS="-V"
+#test_portable_binary_archive is unstable
+#https://github.com/USCiLab/cereal/issues/338
+make -C %{_target_platform} test ARGS="-V -E test_portable_binary_archive"
 
 %files devel
 %doc README.md