diff --git a/src/dioptra/client/workflows.py b/src/dioptra/client/workflows.py
index c7750ad22..867f44d54 100644
--- a/src/dioptra/client/workflows.py
+++ b/src/dioptra/client/workflows.py
@@ -111,9 +111,9 @@ def analyze_plugin_task_signatures(self, filename=None, fileContents=None) -> T:
 
         """
 
-        filename = filename if filename != None else "<string>"
+        filename = filename if filename is not None else "<string>"
 
-        if fileContents == None:
+        if fileContents is None:
             with open(filename, "r+") as f:
                 fileContents = f.read()