diff --git a/scripts/Makefile b/scripts/Makefile
index e1ab4f5fe3..ec910298ea 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -113,7 +113,7 @@ dotnetlibs/xunit.console.exe: $(MONAD_EXT)/xunit/xunit.console.netcore.exe
 	cp -f $^ $@
 
 TEST_FOLDER=../src/ps_test
-TEST_SRCS=$(addprefix $(TEST_FOLDER)/, test_CorePsPlatform.cs)
+TEST_SRCS=$(addprefix $(TEST_FOLDER)/, test_CorePsPlatform.cs test_ExtensionMethods.cs)
 
 dotnetlibs/ps_test.dll: $(TEST_SRCS) dotnetlibs/xunit.core.dll dotnetlibs/xunit.assert.dll dotnetlibs/System.Management.Automation.dll dotnetlibs/Microsoft.PowerShell.Commands.Management.dll dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET)
 	$(CSC) -out:$@ -noconfig -nostdlib -target:library -r:dotnetlibs/System.Management.Automation.dll -r:dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET) -r:dotnetlibs/xunit.core.dll -r:dotnetlibs/xunit.assert.dll ${COREREF} $(TEST_SRCS)
diff --git a/src/monad b/src/monad
index d9e1a2c7b0..f8a9615707 160000
--- a/src/monad
+++ b/src/monad
@@ -1 +1 @@
-Subproject commit d9e1a2c7b0dbab00c185297952cfeaa31f3c5ea5
+Subproject commit f8a9615707051ba572b0cb7705054f9ae15d6b66
diff --git a/src/ps_test/ps_test.cs b/src/ps_test/ps_test.cs
index a4a7185338..3a7f011f07 100644
--- a/src/ps_test/ps_test.cs
+++ b/src/ps_test/ps_test.cs
@@ -9,7 +9,11 @@ namespace PSTests
         // - Remove static keywords
         static void Main()
         {
-            PlatformTests.testIsLinux();
+            PlatformTests.TestIsLinux();
+            PlatformTests.TestHasCom();
+
+            PSTypeExtensionsTests.TestIsComObject();
+
             Console.WriteLine("Finished running tests");
         }
     }
diff --git a/src/ps_test/test_CorePsPlatform.cs b/src/ps_test/test_CorePsPlatform.cs
index cc42fa245a..fb3f5a093f 100644
--- a/src/ps_test/test_CorePsPlatform.cs
+++ b/src/ps_test/test_CorePsPlatform.cs
@@ -1,13 +1,19 @@
 using Xunit;
 using System;
+using System.Management.Automation;
 
 namespace PSTests
 {
     public static class PlatformTests
     {
-        public static void testIsLinux()
+        public static void TestIsLinux()
         {
-            Assert.Equal(System.Management.Automation.Platform.IsLinux(), true);
+            Assert.True(Platform.IsLinux());
+        }
+
+        public static void TestHasCom()
+        {
+            Assert.False(Platform.HasCom());
         }
     }
 }
diff --git a/src/ps_test/test_ExtensionMethods.cs b/src/ps_test/test_ExtensionMethods.cs
new file mode 100644
index 0000000000..b7b7d82ba8
--- /dev/null
+++ b/src/ps_test/test_ExtensionMethods.cs
@@ -0,0 +1,15 @@
+using Xunit;
+using System;
+using System.Management.Automation;
+
+namespace PSTests
+{
+    public static class PSTypeExtensionsTests
+    {
+        public static void TestIsComObject()
+        {
+            // It just needs an arbitrary type
+            Assert.False(PSTypeExtensions.IsComObject(42.GetType()));
+        }
+    }
+}