Fixed 2.1 legacy header issue

test/src/EncryptSignDirectLoopTest.cc

@@ -3,7 +3,7 @@
 #include <cstring>
 
 #include "pEpEngine.h"
-#include "test_util.h"
+#include "TestUtilities.h"
 #include "TestConstants.h"
 #include "Engine.h"
 #include "pgp_sequoia.h"
@@ -99,4 +99,4 @@ TEST_F(EncryptSignDirectLoopTest, check_encrypt_sign_optional_loop) {
     }
     free_stringlist(keylist);
 }
-#endif
+#endif