diff --git a/src/db/unit_tests/dbGDS2Writer.cc b/src/db/unit_tests/dbGDS2Writer.cc
index b1f6f1246..0e0ebf893 100644
--- a/src/db/unit_tests/dbGDS2Writer.cc
+++ b/src/db/unit_tests/dbGDS2Writer.cc
@@ -1151,5 +1151,5 @@ TEST(166)
 {
   db::GDS2WriterOptions opt;
   opt.max_vertex_count = 4;
-  run_test (_this, "t166.oas.gz", "t166_au.gds.gz", true, opt);
+  run_test (_this, "t166.oas.gz", "t166_au.gds.gz", false, opt);
 }
diff --git a/testdata/gds/bug_166.oas.gz b/testdata/gds/t166.oas.gz
similarity index 100%
rename from testdata/gds/bug_166.oas.gz
rename to testdata/gds/t166.oas.gz
diff --git a/testdata/gds/bug_166_au.gds.gz b/testdata/gds/t166_au.gds.gz
similarity index 100%
rename from testdata/gds/bug_166_au.gds.gz
rename to testdata/gds/t166_au.gds.gz