diff --git a/src/plugins/cpptools/cpplocatorfilter_test.cpp b/src/plugins/cpptools/cpplocatorfilter_test.cpp
index 0dd34708262..482c89b5b1c 100644
--- a/src/plugins/cpptools/cpplocatorfilter_test.cpp
+++ b/src/plugins/cpptools/cpplocatorfilter_test.cpp
@@ -50,7 +50,7 @@ using namespace Utils;
 
 namespace {
 
-enum { debug = 0 };
+const bool debug = qEnvironmentVariable("QTC_DEBUG_CPPLOCATORFILTERTESTCASE") == "1";
 
 QTC_DECLARE_MYTESTDATADIR("../../../tests/cpplocators/")