diff --git a/BaseTools/Tests/GNUmakefile b/BaseTools/Tests/GNUmakefile
index caa4d26c9b..20b387864f 100644
--- a/BaseTools/Tests/GNUmakefile
+++ b/BaseTools/Tests/GNUmakefile
@@ -8,7 +8,7 @@
 all: test
 
 test:
-	@if command -v ${PYTHON_COMMAND} >/dev/null 2>&1; then ${PYTHON_COMMAND} RunTests.py; else python RunTests.py; fi
+	@if command -v "${PYTHON_COMMAND}" >/dev/null 2>&1; then ${PYTHON_COMMAND} RunTests.py; else python RunTests.py; fi
 
 clean:
 	find . -name '*.pyc' -exec rm '{}' ';'