diff --git a/lib/xctool/xctool.rb b/lib/xctool/xctool.rb
index 8b852a4..d259bb2 100644
--- a/lib/xctool/xctool.rb
+++ b/lib/xctool/xctool.rb
@@ -28,7 +28,6 @@ def append_run_tests(test_sdk)
         -failOnEmptyTestBundles
         -freshSimulator
         -parallelize
-        -simulator iphone
       CMD
       @cmd << "-only '#{only}'" if only
     end
@@ -40,7 +39,6 @@ def append_test(test_sdk)
         -freshSimulator
         -parallelize
         -failOnEmptyTestBundles
-        -simulator iphone
       CMD
       @cmd << "-only '#{only}'" if only
     end
diff --git a/spec/xctool_spec.rb b/spec/xctool_spec.rb
index 6f8f0f6..0158e69 100644
--- a/spec/xctool_spec.rb
+++ b/spec/xctool_spec.rb
@@ -96,6 +96,10 @@
       subject.as_cmd.should include("test -test-sdk 'sdk2'")
       subject.as_cmd.should_not include("test -test-sdk 'build_sdk'")
     end
+
+    it "should not include -simulator" do
+      subject.test.test.test.as_cmd.should_not match(/-simulator/)
+    end
   end
 
   describe "#clean" do
@@ -135,6 +139,10 @@
       it "should append multiple run-tests subcommands with varying test-sdks" do
         subject.with_test_sdk("test_sdk1").with_test_sdk("test_sdk2").run_tests.as_cmd.should match(/run-tests -test-sdk 'test_sdk1'.*run-tests -test-sdk 'test_sdk2'/)
       end
+
+      it "should not include -simulator" do
+        subject.with_test_sdk("sdk").run_tests.as_cmd.should_not match(/-simulator/)
+      end
     end
 
     describe "#with_all_test_sdks" do