diff --git a/test/test_oeffis.py b/test/test_oeffis.py
index 04a00cc..bc06858 100644
--- a/test/test_oeffis.py
+++ b/test/test_oeffis.py
@@ -182,13 +182,13 @@ class Oeffis:
     """
 
     def __init__(self, userdata=None):
-        l = LibOeffis.instance()
-        self.ctx = l.oeffis_new(userdata)  # type: ignore
+        lib = LibOeffis.instance()
+        self.ctx = lib.oeffis_new(userdata)  # type: ignore
 
         def wrapper(func):
             return lambda *args, **kwargs: func(self.ctx, *args, **kwargs)
 
-        for api in l._api_prototypes:
+        for api in lib._api_prototypes:
             # skip some APIs that are not be exposed because they don't make sense
             # to have in python.
             if api.name not in (
@@ -197,11 +197,11 @@ class Oeffis:
                 "oeffis_get_user_data",
                 "oeffis_set_user_data",
             ):
-                func = getattr(l, api.name)
+                func = getattr(lib, api.name)
                 setattr(self, api.basename, wrapper(func))
 
-        for e in l._enums:
-            val = getattr(l, e.name)
+        for e in lib._enums:
+            val = getattr(lib, e.name)
             setattr(self, e.basename, val)
 
     @property