Enable pytest pre-commit

Change-Id: Ia00a9fa0d260c68ce8532dec9925467558fe7dea
Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
diff --git a/setup.cfg b/setup.cfg
index 369d139..6420a40 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,6 +27,7 @@
     generator
     checker
     frameworks
+    tests
     xunit
     json2fbbin
     json2numpy