Adapt tests to new pyam version

message_ix/tests/test_report.py

@@ -1,5 +1,6 @@
 import logging
 import re
+import sys
 from functools import partial
 from pathlib import Path
 
@@ -204,6 +205,18 @@ def add_tm(df, name="Activity"):
 
     # Variable names were formatted by the callback
     reg_var = pd.DataFrame(
+        [
+            ["seattle", "Activity|canning_plant|production"],
+            ["seattle", "Activity|transport_from_seattle|to_new-york"],
+            ["seattle", "Activity|transport_from_seattle|to_chicago"],
+            ["seattle", "Activity|transport_from_seattle|to_topeka"],
+            ["san-diego", "Activity|canning_plant|production"],
+            ["san-diego", "Activity|transport_from_san-diego|to_new-york"],
+            ["san-diego", "Activity|transport_from_san-diego|to_chicago"],
+            ["san-diego", "Activity|transport_from_san-diego|to_topeka"],
+        ],
+        columns=["region", "variable"],
+    ) if sys.version_info >= (3, 10) else pd.DataFrame(
         [
             ["san-diego", "Activity|canning_plant|production"],
             ["san-diego", "Activity|transport_from_san-diego|to_chicago"],