diff --git a/test_regress/t/t_trace_cat_saif.py b/test_regress/t/t_trace_cat_saif.py
index 75cb14aae..e23910857 100755
--- a/test_regress/t/t_trace_cat_saif.py
+++ b/test_regress/t/t_trace_cat_saif.py
@@ -19,7 +19,7 @@ test.compile(make_top_shell=False,
 
 test.execute()
 
-test.saif_identical(test.obj_dir + "/simpart_0000.saif", "t/" + test.name + "_0000.saif")
-test.saif_identical(test.obj_dir + "/simpart_0100.saif", "t/" + test.name + "_0100.saif")
+test.saif_identical(test.obj_dir + "/simpart_0000.saif", "t/" + test.name + "_0000.out")
+test.saif_identical(test.obj_dir + "/simpart_0100.saif", "t/" + test.name + "_0100.out")
 
 test.passes()
diff --git a/test_regress/t/t_trace_cat_saif_0000.saif b/test_regress/t/t_trace_cat_saif_0000.out
similarity index 100%
rename from test_regress/t/t_trace_cat_saif_0000.saif
rename to test_regress/t/t_trace_cat_saif_0000.out
diff --git a/test_regress/t/t_trace_cat_saif_0100.saif b/test_regress/t/t_trace_cat_saif_0100.out
similarity index 100%
rename from test_regress/t/t_trace_cat_saif_0100.saif
rename to test_regress/t/t_trace_cat_saif_0100.out