Rakefile in instana-1.1.0 vs Rakefile in instana-1.2.0

@@ -7,9 +7,24 @@
   t.ruby_opts = []
 
   t.libs << "test"
   t.libs << "lib"
   t.test_files = FileList['test/**/*_test.rb']
+
+  case File.basename(ENV['BUNDLE_GEMFILE']).split('.').first
+  when /rails50/
+    t.test_files = FileList['test/frameworks/rails/activerecord5_test.rb'] + FileList['test/frameworks/rails/actioncontroller_test.rb']
+  when /rails42/
+    t.test_files = FileList['test/frameworks/rails/activerecord4_test.rb'] + FileList['test/frameworks/rails/actioncontroller_test.rb']
+  when /rails32/
+    t.test_files = FileList['test/frameworks/rails/activerecord3_test.rb'] + FileList['test/frameworks/rails/actioncontroller_test.rb']
+  when /libraries/
+    t.test_files = FileList['test/instrumentation/*_test.rb']
+  else
+    t.test_files = FileList['test/agent/*_test.rb'] +
+                   FileList['test/tracing/*_test.rb'] +
+                   FileList['test/profiling/*_test.rb']
+  end
 end
 
 task :environment do
   ENV['INSTANA_GEM_DEV'] = 'true'
   Bundler.require(:default, :development)