diff --git a/test/mmtk/test_configuration.rb b/test/mmtk/test_configuration.rb
index 1191a27e6d..e2d0cf46a1 100644
--- a/test/mmtk/test_configuration.rb
+++ b/test/mmtk/test_configuration.rb
@@ -2,15 +2,17 @@
 require_relative "helper"
 module MMTk
   class TestConfiguration < TestCase
-    def test_invalid_MMTK_THREADS
-      exit_code = assert_in_out_err(
-        [{ "MMTK_THREADS" => "foobar" }, "--"],
-        "",
-        [],
-        ["[FATAL] Invalid MMTK_THREADS foobar"]
-      )
+    %w(MMTK_THREADS MMTK_HEAP_MIN MMTK_HEAP_MAX).each do |var|
+      define_method(:"test_invalid_#{var}") do
+        exit_code = assert_in_out_err(
+          [{ var => "foobar" }, "--"],
+          "",
+          [],
+          ["[FATAL] Invalid #{var} foobar"]
+        )
 
-      assert_equal(1, exit_code.exitstatus)
+        assert_equal(1, exit_code.exitstatus)
+      end
     end
   end
 end