1 file changed, 5 insertions, 0 deletions
diff --git a/tests/extensions/harness.lua b/tests/extensions/harness.lua
index b54f727..1e2fe08 100644
--- a/tests/extensions/harness.lua
+++ b/tests/extensions/harness.lua
@@ -279,11 +279,16 @@ function harness.excludes(name, haystack, needle)
 	end
 end
 
+-- A run that made no check proves nothing, so it fails as well.
 function harness.finish()
 	if failures > 0 then
 		io.write(failures, " of ", checks, " checks failed\n")
 		os.exit(1)
 	end
+	if checks == 0 then
+		io.write("no checks ran\n")
+		os.exit(1)
+	end
 	io.write("passed ", checks, " checks\n")
 	os.exit(0)
 end