diff --git a/am-shared/tools-grammarcheckers-tests-dir-include.am b/am-shared/tools-grammarcheckers-tests-dir-include.am
index 26d082e1..0c08a9c0 100644
--- a/am-shared/tools-grammarcheckers-tests-dir-include.am
+++ b/am-shared/tools-grammarcheckers-tests-dir-include.am
@@ -8,6 +8,6 @@ if WANT_GRAMCHECK
 
 # Default variable for all languages
 LOG_COMPILER=gtgramtool
-AM_LOG_FLAGS=test --spec ../$(GTLANG2).zcheck yaml
+AM_LOG_FLAGS=test --hide-passes --spec ../$(GTLANG2).zcheck yaml
 
 endif # WANT_GRAMCHECK