diff --git a/scripts/measure_workflows.py b/scripts/measure_workflows.py
index b7f9965..79ca570 100644
--- a/scripts/measure_workflows.py
+++ b/scripts/measure_workflows.py
@@ -259,9 +259,9 @@ def auth(dxf, response):
             print(f"Failed to fetch manifest for {tag}")
             continue
         if type(manifest) is dict:
-            if arch is "amd64":
+            if arch == "amd64":
                 manifest = manifest["linux/amd64"]
-            elif arch is "arm64":
+            elif arch == "arm64":
                 manifest = manifest["linux/arm64"]
             else:
                 continue