diff --git a/test/runnable/imports/test41a.d b/test/runnable/imports/test41a.d
index 20750c913c04..acc1b8cecd92 100644
--- a/test/runnable/imports/test41a.d
+++ b/test/runnable/imports/test41a.d
@@ -5,8 +5,9 @@ void foo()
         assert(false, "GO");
 }
 
+int i; // make func impure so it is not ctfed away
 public void func(T)()
 {
-        assert(false, "Blah");
+        assert(i, "Blah");
 }
 
diff --git a/test/runnable/test41.d b/test/runnable/test41.d
index 89f4e81a4b33..cc6f93971a05 100644
--- a/test/runnable/test41.d
+++ b/test/runnable/test41.d
@@ -14,7 +14,7 @@ int main()
     catch (AssertError e)
     {
     }
-    
+
     try
     {
         func!(void)();