diff -up jellyfish-0.8.2/jellyfish/test.py.test jellyfish-0.8.2/jellyfish/test.py
--- jellyfish-0.8.2/jellyfish/test.py.test	2020-12-01 16:26:17.633006776 +0100
+++ jellyfish-0.8.2/jellyfish/test.py	2020-12-01 16:26:25.583107748 +0100
@@ -11,7 +11,7 @@ def assertAlmostEqual(a, b, places=3):
 
 
 if platform.python_implementation() == "CPython":
-    implementations = ["python", "c"]
+    implementations = ["python"]
 else:
     implementations = ["python"]