tests: migrations: report correct file name

Change-Id: Ic4055afadca26650659ca5dd99e01d3df0e42e6a
diff --git a/tests/czechlight-cfg-fs/migrations.py b/tests/czechlight-cfg-fs/migrations.py
index d243d06..7502b0f 100644
--- a/tests/czechlight-cfg-fs/migrations.py
+++ b/tests/czechlight-cfg-fs/migrations.py
@@ -130,7 +130,7 @@
 
     with open(sysrepo_fixture.export_file, 'r') as fp_actual:
         with open(sysrepo_fixture.expected_file, 'r') as fp_expected:
-            print(f'migration: comparing files {sysrepo_fixture.startup_file.name} and {sysrepo_fixture.expected_file.name}')
+            print(f'migration: comparing files {sysrepo_fixture.export_file.name} and {sysrepo_fixture.expected_file.name}')
 
             actual = json.load(fp_actual)
             expected = json.load(fp_expected)