diff --git a/test_libs/pyspec/eth2spec/test/context.py b/test_libs/pyspec/eth2spec/test/context.py
index 149836787..0add9f638 100644
--- a/test_libs/pyspec/eth2spec/test/context.py
+++ b/test_libs/pyspec/eth2spec/test/context.py
@@ -112,7 +112,7 @@ def single_phase(fn):
     def entry(*args, **kw):
         if 'phases' in kw:
             kw.pop('phases')
-        fn(*args, **kw)
+        return fn(*args, **kw)
     return entry