diff --git a/tests/scripts/defines.sh b/tests/scripts/defines.sh
index d9890d53ec..b715e2d8d6 100755
--- a/tests/scripts/defines.sh
+++ b/tests/scripts/defines.sh
@@ -41,7 +41,7 @@ SLAPINDEX="../servers/slapd/tools/slapindex $LDAP_VERBOSE"
 
 unset DIFF_OPTIONS
 DIFF="diff -iu"
-CMP="diff -io"
+CMP="diff -i"
 CMPOUT=/dev/null
 SLAPD="../servers/slapd/slapd -s0"
 SLURPD=../servers/slurpd/slurpd