diff --git a/src/drc/unit_tests/drcSimpleTests.cc b/src/drc/unit_tests/drcSimpleTests.cc
index 2547f4e9b..46abfdfe1 100644
--- a/src/drc/unit_tests/drcSimpleTests.cc
+++ b/src/drc/unit_tests/drcSimpleTests.cc
@@ -756,47 +756,7 @@ TEST(16_issue570)
   db::compare_layouts (_this, layout, au, db::NoNormalization);
 }
 
-TEST(17_breaking)
-{
-  std::string rs = tl::testsrc ();
-  rs += "/testdata/drc/drcSimpleTests_17.drc";
-
-  std::string input = tl::testsrc ();
-  input += "/testdata/drc/drcSimpleTests_17.gds";
-
-  std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au17.gds";
-
-  std::string output = this->tmp_file ("tmp.gds");
-
-  {
-    //  Set some variables
-    lym::Macro config;
-    config.set_text (tl::sprintf (
-        "$drc_test_source = '%s'\n"
-        "$drc_test_target = '%s'\n"
-      , input, output)
-    );
-    config.set_interpreter (lym::Macro::Ruby);
-    EXPECT_EQ (config.run (), 0);
-  }
-
-  lym::Macro drc;
-  drc.load_from (rs);
-  EXPECT_EQ (drc.run (), 0);
-
-  db::Layout layout;
-
-  {
-    tl::InputStream stream (output);
-    db::Reader reader (stream);
-    reader.read (layout);
-  }
-
-  db::compare_layouts (_this, layout, au, db::NoNormalization);
-}
-
-TEST(18_breaking)
+TEST(18_forget)
 {
   std::string rs = tl::testsrc ();
   rs += "/testdata/drc/drcSimpleTests_18.drc";
@@ -916,3 +876,43 @@ TEST(20_interact_with_count)
   db::compare_layouts (_this, layout, au, db::NoNormalization);
 }
 
+TEST(21_breaking)
+{
+  std::string rs = tl::testsrc ();
+  rs += "/testdata/drc/drcSimpleTests_21.drc";
+
+  std::string input = tl::testsrc ();
+  input += "/testdata/drc/drcSimpleTests_21.gds";
+
+  std::string au = tl::testsrc ();
+  au += "/testdata/drc/drcSimpleTests_au21.gds";
+
+  std::string output = this->tmp_file ("tmp.gds");
+
+  {
+    //  Set some variables
+    lym::Macro config;
+    config.set_text (tl::sprintf (
+        "$drc_test_source = '%s'\n"
+        "$drc_test_target = '%s'\n"
+      , input, output)
+    );
+    config.set_interpreter (lym::Macro::Ruby);
+    EXPECT_EQ (config.run (), 0);
+  }
+
+  lym::Macro drc;
+  drc.load_from (rs);
+  EXPECT_EQ (drc.run (), 0);
+
+  db::Layout layout;
+
+  {
+    tl::InputStream stream (output);
+    db::Reader reader (stream);
+    reader.read (layout);
+  }
+
+  db::compare_layouts (_this, layout, au, db::NoNormalization);
+}
+
diff --git a/testdata/drc/drcSimpleTests_18.drc b/testdata/drc/drcSimpleTests_18.drc
index 6f1ce97bb..48d347615 100644
--- a/testdata/drc/drcSimpleTests_18.drc
+++ b/testdata/drc/drcSimpleTests_18.drc
@@ -1,5 +1,5 @@
 
-# Hierarchical antenna check
+# "forget"
 
 source($drc_test_source, "TOP")
 target($drc_test_target)
diff --git a/testdata/drc/drcSimpleTests_19.drc b/testdata/drc/drcSimpleTests_19.drc
index e7c403d11..60d92f511 100644
--- a/testdata/drc/drcSimpleTests_19.drc
+++ b/testdata/drc/drcSimpleTests_19.drc
@@ -1,5 +1,5 @@
 
-# Hierarchical antenna check
+# shielded/transparent
 
 source($drc_test_source, "TOP")
 target($drc_test_target)
diff --git a/testdata/drc/drcSimpleTests_20.drc b/testdata/drc/drcSimpleTests_20.drc
index 9bd481a5e..c5c803995 100644
--- a/testdata/drc/drcSimpleTests_20.drc
+++ b/testdata/drc/drcSimpleTests_20.drc
@@ -1,5 +1,5 @@
 
-# Hierarchical antenna check
+# Interact with count
 
 source($drc_test_source, "TOP")
 target($drc_test_target)
diff --git a/testdata/drc/drcSimpleTests_17.drc b/testdata/drc/drcSimpleTests_21.drc
similarity index 94%
rename from testdata/drc/drcSimpleTests_17.drc
rename to testdata/drc/drcSimpleTests_21.drc
index 1b3573d39..8eded9eae 100644
--- a/testdata/drc/drcSimpleTests_17.drc
+++ b/testdata/drc/drcSimpleTests_21.drc
@@ -1,5 +1,5 @@
 
-# Hierarchical antenna check
+# Breaking
 
 source($drc_test_source, "TOP")
 target($drc_test_target)
diff --git a/testdata/drc/drcSimpleTests_17.gds b/testdata/drc/drcSimpleTests_21.gds
similarity index 100%
rename from testdata/drc/drcSimpleTests_17.gds
rename to testdata/drc/drcSimpleTests_21.gds
diff --git a/testdata/drc/drcSimpleTests_au17.gds b/testdata/drc/drcSimpleTests_au21.gds
similarity index 100%
rename from testdata/drc/drcSimpleTests_au17.gds
rename to testdata/drc/drcSimpleTests_au21.gds