diff --git a/test/instrument_test.exs b/test/instrument_test.exs
index bf427d8..41bc4aa 100644
--- a/test/instrument_test.exs
+++ b/test/instrument_test.exs
@@ -156,11 +156,13 @@ defmodule PropCheck.Test.InstrumentTester do
     Logger.debug(inspect(mod.module_info(:attributes)))
   end
 
+  @tag will_fail: true
+  # Fails as asn1rt_nif is not available
   test "instrument an entire application" do
     Logger.debug("All Apps: #{inspect(Application.loaded_applications())}")
-    # The ASN1 compiler is not really used, so no damage is expected
+    # The asn1 compiler is not really used, so no damage is expected
     app = :asn1
-    all_modules = Application.spec(app, :modules)
+    assert all_modules = Application.spec(app, :modules)
     Enum.each(all_modules, fn m -> assert not Instrument.is_instrumented?(m) end)
 
     assert :ok == Instrument.instrument_app(app, MessageInstrumenter)