support command line naming of test to run
diff --git a/test/run_tests.h b/test/run_tests.h
index 6c33e06..3170a33 100644
--- a/test/run_tests.h
+++ b/test/run_tests.h
@@ -33,4 +33,4 @@
 //  Created by Laurence Lundblade on 9/30/18.
 typedef int (*outputstring)(const char *szString, void *ctx);
 
-int run_tests(outputstring output, void *poutCtx, int *pNumTestsRun);
+int run_tests(const char *szTestName, outputstring output, void *poutCtx, int *pNumTestsRun);