diff --git a/tests/main_test.py b/tests/main_test.py
index 7f13671f..d5e0795d 100644
--- a/tests/main_test.py
+++ b/tests/main_test.py
@@ -23,7 +23,7 @@
 )
 
 
-def assert_extract(  # pylint: disable=missing-docstring
+def assert_extract(
     url,
     expected_domain_data,
     expected_ip_data="",
@@ -35,6 +35,9 @@ def assert_extract(  # pylint: disable=missing-docstring
         extract_using_fallback_to_snapshot_no_cache,
     ),
 ):
+    """Test helper to compare all the expected and actual attributes and
+    properties of an extraction. Runs the same comparison across several
+    permutations of tldextract instance configurations."""
     (
         expected_fqdn,
         expected_subdomain,
diff --git a/tldextract/cache.py b/tldextract/cache.py
index c69369ef..371ae07e 100644
--- a/tldextract/cache.py
+++ b/tldextract/cache.py
@@ -97,9 +97,7 @@ def get(self, namespace, key):
                 return json.load(cache_file)
         except (OSError, ValueError) as exc:
             LOG.error("error reading TLD cache file %s: %s", cache_filepath, exc)
-            raise KeyError(  # pylint: disable=raise-missing-from
-                "namespace: " + namespace + " key: " + repr(key)
-            )
+            raise KeyError("namespace: " + namespace + " key: " + repr(key)) from None
 
     def set(self, namespace, key, value):
         """Set a value in the disk cache"""