diff --git a/cyrus-imapd.spec b/cyrus-imapd.spec
index 73e1c32..c8d103f 100644
--- a/cyrus-imapd.spec
+++ b/cyrus-imapd.spec
@@ -428,8 +428,8 @@ exit 0
 %endif
 
 %ifarch s390x
-# Uncomment the exit if s390x is being too slow to get a useful build out.
-#exit 0
+# If s390x is being too slow to pass the tests, just don't run tests there.
+exit 0
 %endif
 
 # Run the Cassandane test suite.  This will exhaustively test the various