diff --git a/Makefile b/Makefile
index ced0d28..52b7a56 100644
--- a/Makefile
+++ b/Makefile
@@ -223,7 +223,7 @@ test-dir-destination-chint:
 
 test-fixed-intervals: $(CCOLLECT_SOURCE) test-dir-source test-dir-destination test-dir-destination-chint
 	for s in ./test/conf/sources/*; do \
-		CCOLLECT_CONF=./test/conf ./ccollect -l ${TEST_LOG_FILE} daily "$$(basename $$s)"; \
+		CCOLLECT_CONF=./test/conf ./ccollect -l ${TEST_LOG_FILE} daily "$$(basename '$$s')"; \
 		test "$$(ls -1 /tmp/ccollect/backup | wc -l)" -gt "0" || { cat ${TEST_LOG_FILE}; exit 1; }; \
 	done
 	CCOLLECT_CONF=./test/conf ./ccollect -l ${TEST_LOG_FILE} -a -v daily