diff --git a/tests/scripts/test018-syncreplication-persist b/tests/scripts/test018-syncreplication-persist
index ffe42ff954..7352329df7 100755
--- a/tests/scripts/test018-syncreplication-persist
+++ b/tests/scripts/test018-syncreplication-persist
@@ -495,6 +495,14 @@ EOMODS
 	sleep $SLEEP1
 fi
 
+# Testing a cancel exop (should go in its own testcase)
+$LDAPSEARCH -D "$MANAGERDN" -h $LOCALHOST -p $PORT1 -w $PASSWD \
+	-e '!cancel' \
+	'(objectclass=*)' '*' $OPATTRS > $TESTOUT 2>&1
+RC=$?
+# cancelled operation returns -1, so no point of checking return code, either
+# it's cancelled or we get stuck forever
+
 echo "Using ldapsearch to read all the entries from the provider..."
 $LDAPSEARCH -S "" -b "$BASEDN" -h $LOCALHOST -p $PORT1 \
 	'(objectclass=*)' '*' $OPATTRS > $MASTEROUT 2>&1