diff --git a/test/.excludes-mmtk/TestObjSpace.rb b/test/.excludes-mmtk/TestObjSpace.rb
index 200faced19..05666e46f0 100644
--- a/test/.excludes-mmtk/TestObjSpace.rb
+++ b/test/.excludes-mmtk/TestObjSpace.rb
@@ -1,4 +1,3 @@
 exclude(:test_dump_all_full, "testing behaviour specific to default GC")
 exclude(:test_dump_flag_age, "testing behaviour specific to default GC")
 exclude(:test_dump_flags, "testing behaviour specific to default GC")
-exclude(:test_finalizer, "times out in debug mode on Ubuntu")
diff --git a/test/.excludes-mmtk/TestObjectSpace.rb b/test/.excludes-mmtk/TestObjectSpace.rb
new file mode 100644
index 0000000000..a92be8090c
--- /dev/null
+++ b/test/.excludes-mmtk/TestObjectSpace.rb
@@ -0,0 +1 @@
+exclude(:test_finalizer, "times out in debug mode on Ubuntu")