diff --git a/plugins/hub/sidetag_hub.py b/plugins/hub/sidetag_hub.py
index bb910ed1..3cd76ce1 100644
--- a/plugins/hub/sidetag_hub.py
+++ b/plugins/hub/sidetag_hub.py
@@ -65,24 +65,24 @@ class SidetagOwnerTest(koji.policy.MatchTest):
     name = 'is_sidetag_owner'
 
     def run(self, data):
-        values = self.str.split()[1:]
-        if len(values) > 1:
+        fields = self.str.split()[1:]
+        if len(fields) > 1:
             raise koji.GenericError("Just one argument is allowed for this test.")
-        elif values:
-            value = values[0]
-            if value not in ('tag', 'fromtag', 'both'):
+        elif fields:
+            key = fields[0]
+            if key not in ('tag', 'fromtag', 'both'):
                 raise koji.GenericError("Policy test is_sidetag_owner has only "
-                                        f"/tag/fromtag/both options (got {value})")
-            if value == 'both':
-                values = ['tag', 'fromtag']
+                                        f"/tag/fromtag/both options (got {key})")
+            if key == 'both':
+                fields = ['tag', 'fromtag']
         else:
-            values = ['tag']
+            fields = ['tag']
 
         user = policy_get_user(data)
-        for value in values:
-            if value not in data:
+        for field in fields:
+            if field not in data:
                 return False
-            tag = get_tag(value)
+            tag = get_tag(data[field])
             if not tag or not is_sidetag_owner(tag, user):
                 return False
         return True