Rakefile in testrbl-0.1.15 vs Rakefile in testrbl-0.1.16

@@ -1,11 +1,11 @@
 require 'bundler/setup'
 require 'bundler/gem_tasks'
 
 task :default do
-  # tests do not run with test-unit 1.x.x since it defines testrb and overshadows 1.9s native testrb
+  # tests do not run with test-unit 1.x.x or <=2.3 since it defines testrb and overshadows 1.9s native testrb
   if `which testrb`.include?("/gems/")
-    raise "tests do not run with test-unit 1.x.x installed\nyes | gem uninstall -a test-unit && bundle"
+    raise "tests do not run with test-unit testrb installed\nyes | gem uninstall -a test-unit && bundle"
   end
 
   sh "rspec spec/"
 end