diff --git a/test/testpreprocessor.cpp b/test/testpreprocessor.cpp
index a272f98c9..d64460bf3 100644
--- a/test/testpreprocessor.cpp
+++ b/test/testpreprocessor.cpp
@@ -3540,6 +3540,7 @@ private:
         Preprocessor preprocessor(&settings, this);
 
         ASSERT_EQUALS(true, preprocessor.validateCfg("", "X=42"));  // don't hang when parsing cfg
+        ASSERT_EQUALS(false, preprocessor.validateCfg("int y=Y;", "X=42;Y"));
         ASSERT_EQUALS(false, preprocessor.validateCfg("int x=X;", "X"));
         ASSERT_EQUALS(false, preprocessor.validateCfg("X=1;", "X"));
         ASSERT_EQUALS(true, preprocessor.validateCfg("int x=X;", "Y"));