diff --git a/scripts/Makefile b/scripts/Makefile
index 174a68bd0e..00d0874c3d 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -41,16 +41,16 @@ MI_REF_ASSEMBLY=-r:$(MONAD_EXT)/PS/PS_refs_modil/microsoft.management.infrastruc
 MI_ASSEMBLY=dotnetlibs/Microsoft.Management.Infrastructure.dll
 MI_REF=-r:$(MI_ASSEMBLY)
 
-PRODUCT_BASE_REFS=${COREREF}
-PRODUCT_MI_REFS=${COREREF} ${MI_NATIVE_REF}
-PRODUCT_PS_REFS=${COREREF} ${MI_REF} -r:dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET)
-PRODUCT_COMMANDS_REFS=${COREREF} -r:dotnetlibs/System.Management.Automation.dll
+PRODUCT_BASE_REFS=$(COREREF)
+PRODUCT_MI_REFS=$(COREREF) $(MI_NATIVE_REF)
+PRODUCT_PS_REFS=$(COREREF) $(MI_REF) -r:dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET)
+PRODUCT_COMMANDS_REFS=$(COREREF) -r:dotnetlibs/System.Management.Automation.dll
 
 MCSOPTS_BASE=-unsafe -nostdlib -noconfig -define:CORECLR -define:_CORECLR
-MCSOPTS_MI=${MCSOPTS_BASE} -target:library
-MCSOPTS_LIB=${MCSOPTS_BASE} -target:library
-MCSOPTS_PS=${STRING_RESOURCES_ORIG} ${MCSOPTS_BASE} -target:library
-SRCS_ALL=${STRING_RESOURCES} ${SRCS}
+MCSOPTS_MI=$(MCSOPTS_BASE) -target:library
+MCSOPTS_LIB=$(MCSOPTS_BASE) -target:library
+MCSOPTS_PS=$(STRING_RESOURCES_ORIG) $(MCSOPTS_BASE) -target:library
+SRCS_ALL=$(STRING_RESOURCES) $(SRCS)
 
 # compilers
 # - Roslyn's csc is used for all the PS code
@@ -63,28 +63,28 @@ RUN_TARGETS=$(POWERSHELL_RUN_TARGETS) dotnetlibs/Microsoft.PowerShell.Commands.M
 all: dotnetlibs/System.Management.Automation.dll $(RUN_TARGETS) dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET)
 
 # this is the build rule for SMA.dll
-dotnetlibs/System.Management.Automation.dll: ${SYS_AUTO_SRCS} dotnetlibs/Microsoft.Management.Infrastructure.dll ../src/assembly-info/System.Management.Automation.assembly-info.cs dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET) $(PLATFORM_SRCS) ${SYS_AUTO_RES_SRCS} ${SYS_AUTO_RES_CS_SRCS}
-	$(CSC) -out:$@ ${MCSOPTS_LIB} ${PRODUCT_PS_REFS} ${SYS_AUTO_SRCS} ${SYS_AUTO_RES_REF} ${SYS_AUTO_RES_CS_SRCS} $(PLATFORM_SRCS) ../src/assembly-info/System.Management.Automation.assembly-info.cs
+dotnetlibs/System.Management.Automation.dll: $(SYS_AUTO_SRCS) dotnetlibs/Microsoft.Management.Infrastructure.dll ../src/assembly-info/System.Management.Automation.assembly-info.cs dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET) $(PLATFORM_SRCS) $(SYS_AUTO_RES_SRCS) $(SYS_AUTO_RES_CS_SRCS)
+	$(CSC) -out:$@ $(MCSOPTS_LIB) $(PRODUCT_PS_REFS) $(SYS_AUTO_SRCS) $(SYS_AUTO_RES_REF) $(SYS_AUTO_RES_CS_SRCS) $(PLATFORM_SRCS) ../src/assembly-info/System.Management.Automation.assembly-info.cs
 
 # this is the build rule for MMI.dll
-dotnetlibs/Microsoft.Management.Infrastructure.dll: ${MAN_INFRA_SRCS} dotnetlibs/Microsoft.Management.Infrastructure.Native.dll ../src/assembly-info/Microsoft.Management.Infrastructure.assembly-info.cs $(MAN_INFRA_RES_SRCS) $(MAN_INFRA_RES_CS_SRCS)
+dotnetlibs/Microsoft.Management.Infrastructure.dll: $(MAN_INFRA_SRCS) dotnetlibs/Microsoft.Management.Infrastructure.Native.dll ../src/assembly-info/Microsoft.Management.Infrastructure.assembly-info.cs $(MAN_INFRA_RES_SRCS) $(MAN_INFRA_RES_CS_SRCS)
 	$(CSC) -out:$@ $(MCSOPTS_MI) $(PRODUCT_MI_REFS) $(MAN_INFRA_SRCS) $(MAN_INFRA_RES_REF) $(MAN_INFRA_RES_CS_SRCS) ../src/assembly-info/Microsoft.Management.Infrastructure.assembly-info.cs
 
 # Commands
 
-dotnetlibs/Microsoft.PowerShell.Commands.Management.dll: ${COMMANDS_MANAGEMENT_SRCS} dotnetlibs/System.Management.Automation.dll ${COMMANDS_MANAGEMENT_RES_SRCS} ${COMMANDS_MANAGEMENT_RES_CS_SRCS} $(MI_ASSEMBLY)
-	$(CSC) -out:$@ ${MCSOPTS_LIB} ${PRODUCT_COMMANDS_REFS} ${COMMANDS_MANAGEMENT_SRCS} ${COMMANDS_MANAGEMENT_RES_CS_SRCS} $(COMMANDS_MANAGEMENT_RES_REF) $(MI_REF)
+dotnetlibs/Microsoft.PowerShell.Commands.Management.dll: $(COMMANDS_MANAGEMENT_SRCS) dotnetlibs/System.Management.Automation.dll dotnetlibs/Microsoft.PowerShell.Security.dll $(COMMANDS_MANAGEMENT_RES_SRCS) $(COMMANDS_MANAGEMENT_RES_CS_SRCS) $(MI_ASSEMBLY)
+	$(CSC) -out:$@ $(MCSOPTS_LIB) $(PRODUCT_COMMANDS_REFS) $(COMMANDS_MANAGEMENT_SRCS) $(COMMANDS_MANAGEMENT_RES_CS_SRCS) $(COMMANDS_MANAGEMENT_RES_REF) $(MI_REF) -r:dotnetlibs/Microsoft.PowerShell.Security.dll
 
-dotnetlibs/Microsoft.PowerShell.Commands.Utility.dll: ${COMMANDS_UTILITY_SRCS} dotnetlibs/System.Management.Automation.dll ${COMMANDS_UTILITY_RES_SRCS} ${COMMANDS_UTILITY_RES_CS_SRCS}
-	$(CSC) -out:$@ ${MCSOPTS_LIB} ${PRODUCT_COMMANDS_REFS} ${COMMANDS_UTILITY_SRCS} ${COMMANDS_UTILITY_RES_CS_SRCS} $(COMMANDS_UTILITY_RES_REF)
+dotnetlibs/Microsoft.PowerShell.Commands.Utility.dll: $(COMMANDS_UTILITY_SRCS) dotnetlibs/System.Management.Automation.dll $(COMMANDS_UTILITY_RES_SRCS) $(COMMANDS_UTILITY_RES_CS_SRCS)
+	$(CSC) -out:$@ $(MCSOPTS_LIB) $(PRODUCT_COMMANDS_REFS) $(COMMANDS_UTILITY_SRCS) $(COMMANDS_UTILITY_RES_CS_SRCS) $(COMMANDS_UTILITY_RES_REF)
 
-dotnetlibs/Microsoft.PowerShell.Security.dll: ${SECURITY_SRCS} dotnetlibs/System.Management.Automation.dll ${SECURITY_RES_SRCS} ${SECURITY_RES_CS_SRCS}
-	$(CSC) -out:$@ ${MCSOPTS_LIB} ${PRODUCT_COMMANDS_REFS} ${SECURITY_SRCS} ${SECURITY_RES_CS_SRCS} $(SECURITY_RES_REF)
+dotnetlibs/Microsoft.PowerShell.Security.dll: $(SECURITY_SRCS) $(SECURITY_RES_SRCS) $(SECURITY_RES_CS_SRCS)
+	$(CSC) -out:$@ $(MCSOPTS_LIB) $(PRODUCT_COMMANDS_REFS) $(SECURITY_SRCS) $(SECURITY_RES_CS_SRCS) $(SECURITY_RES_REF)
 
 # assembly load context
 
 dotnetlibs/$(ASSEMBLY_LOAD_CONTEXT_TARGET): $(ASSEMBLY_LOAD_CONTEXT_SRCS)
-	$(CSC) -out:$@ ${MCSOPTS_LIB} ${PRODUCT_BASE_REFS} $(ASSEMBLY_LOAD_CONTEXT_SRCS)
+	$(CSC) -out:$@ $(MCSOPTS_LIB) $(PRODUCT_BASE_REFS) $(ASSEMBLY_LOAD_CONTEXT_SRCS)
 
 # this will copy whatever the first version of the dll in the globber is
 buildtemp/System.Reflection.Metadata.dll: buildtemp/System.Reflection.Metadata.*/lib/portable-net45+win8/System.Reflection.Metadata.dll
@@ -101,7 +101,7 @@ dotnetlibs/Microsoft.Management.Infrastructure.Native.dll: ../src/stubs/Microsof
 MPATH=/usr/lib/mono/4.5/Facades
 
 buildtemp/TypeCatalogGen.exe: ../src/monad/monad/nttargets/assemblies/core/PSAssemblyLoadContext/TypeCatalogGen/TypeCatalogGen.cs buildtemp/System.Reflection.Metadata.dll buildtemp/System.Collections.Immutable.dll
-	$(MCS) -out:$@ -target:exe ${NUGETREF} -pkg:dotnet -r:${MPATH}/System.Runtime.dll -r:${MPATH}/System.Reflection.Primitives.dll -r:${MPATH}/System.IO.dll $<
+	$(MCS) -out:$@ -target:exe $(NUGETREF) -pkg:dotnet -r:$(MPATH)/System.Runtime.dll -r:$(MPATH)/System.Reflection.Primitives.dll -r:$(MPATH)/System.IO.dll $<
 
 # generate the Core PS type catalog
 # this comes from: ../src/monad/monad/nttargets/assemblies/core/PSAssemblyLoadContext/makefile.inc
@@ -194,7 +194,7 @@ native-tests: dotnetlibs/monad_native
 
 xunit-tests: $(RUN_TARGETS) internal-prepare-exec_env internal-prepare-release-clr $(addprefix $(TESTRUN_FOLDER)/, ps_test.dll xunit.console.netcore.exe xunit.runner.utility.dll xunit.abstractions.dll xunit.execution.dll)
 	# execute the xUnit runner, with XML output
-	cd exec_env/app_base && PSMODULEPATH=$(shell pwd)/exec_env/app_base/Modules LD_LIBRARY_PATH=../coreclr:. ../coreclr/corerun xunit.console.netcore.exe ps_test.dll -xml ../../xunittests.xml
+	exec_env/app_base/runps-test.sh ps_test.dll -xml ../../xunittests.xml
 
 pester-tests: $(RUN_TARGETS) internal-prepare-exec_env internal-prepare-release-clr
 	# execute the Pester tests, which needs a TEMP environment variable to be set
diff --git a/scripts/runps-test.sh b/scripts/runps-test.sh
new file mode 100755
index 0000000000..5196f708be
--- /dev/null
+++ b/scripts/runps-test.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+CWD=$(pwd)
+SCRIPTDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+
+cd "$SCRIPTDIR"
+PSMODULEPATH="$SCRIPTDIR/Modules" LD_LIBRARY_PATH="$SCRIPTDIR" ./host_cmdline -c ../coreclr -alc Microsoft.PowerShell.CoreCLR.AssemblyLoadContext.dll -tpa xunit.console.netcore.exe xunit.console.netcore.exe "$@"
diff --git a/scripts/tests.mk b/scripts/tests.mk
index 8a7c312a2a..4f9963828a 100644
--- a/scripts/tests.mk
+++ b/scripts/tests.mk
@@ -6,4 +6,4 @@ $(TESTRUN_FOLDER)/xunit%: $(MONAD_EXT)/xunit/xunit%
 	cp -f $^ $@
 
 $(TESTRUN_FOLDER)/ps_test.dll: $(TEST_SRCS) $(addprefix $(TESTRUN_FOLDER)/, xunit.core.dll xunit.assert.dll) $(addprefix dotnetlibs/, System.Management.Automation.dll Microsoft.PowerShell.Commands.Management.dll $(ASSEMBLY_LOAD_CONTEXT_TARGET))
-	$(CSC) -out:$@ -noconfig -nostdlib -target:library $(addprefix -r:$(TESTRUN_FOLDER)/, xunit.core.dll xunit.assert.dll) $(addprefix -r:dotnetlibs/, System.Management.Automation.dll $(ASSEMBLY_LOAD_CONTEXT_TARGET)) ${COREREF} $(TEST_SRCS)
+	$(CSC) -out:$@ -noconfig -nostdlib -target:library $(addprefix -r:$(TESTRUN_FOLDER)/, xunit.core.dll xunit.assert.dll) $(addprefix -r:dotnetlibs/, System.Management.Automation.dll $(ASSEMBLY_LOAD_CONTEXT_TARGET)) $(COREREF) $(TEST_SRCS)
diff --git a/src/monad b/src/monad
index d541b07343..9aecfb12f6 160000
--- a/src/monad
+++ b/src/monad
@@ -1 +1 @@
-Subproject commit d541b073435e55fd96771697e5549cc9a188fa54
+Subproject commit 9aecfb12f69d91908812751e1b69d7c5c8098e07
diff --git a/src/pester-tests/Test-Test-Path.Tests.ps1 b/src/pester-tests/Test-Test-Path.Tests.ps1
new file mode 100644
index 0000000000..83c18d1f4d
--- /dev/null
+++ b/src/pester-tests/Test-Test-Path.Tests.ps1
@@ -0,0 +1,114 @@
+Describe "Test-Test-Path" {
+    $testdirectory = "/usr/bin"
+    $testfilename  = "vi" # use /usr/bin/vi since that's bundled with all linux
+    $testfile      = $testdirectory + "/" + $testfilename
+    It "Should be called on an existing path without error" {
+        { Test-Path $testdirectory }              | Should Not Throw
+        { Test-Path -Path $testdirectory }        | Should Not Throw
+        { Test-Path -LiteralPath $testdirectory } | Should Not Throw
+    }
+
+    It "Should allow piping objects to it" {
+        { $testdirectory | Test-Path  } | Should Not Throw
+
+        $testdirectory                  | Test-Path | Should Be $true
+        "/usr/bin/totallyFakeDirectory" | Test-Path | Should Be $false
+    }
+
+    It "Should return a boolean data type" {
+        { Test-Path -Path $testdirectory } | Should Be $true
+    }
+
+    It "Should be called on a nonexistant path without error" {
+        { Test-Path -Path "aNonexistant/path/that/should/error" } | Should Not Throw
+    }
+
+    It "Should return false for a nonexistant path" {
+        Test-Path -Path "aNonexistant/path/that/should/error" | Should Be $false
+    }
+
+    It "Should return true for an existing path" {
+        Test-Path -Path $testdirectory | Should Be $true
+    }
+
+    It "Should be able to accept a regular expression" {
+        { Test-Path -Path "/u*" }      | Should Not Throw
+        { Test-Path -Path "/u[a-z]r" } | Should Not Throw
+    }
+
+    It "Should be able to return the correct result when a regular expression is used" {
+        Test-Path -Path "/u*"      | Should Be $true
+        Test-Path -Path "/u[a-z]*" | Should Be $true
+
+        Test-Path -Path "/aoeu*"  | Should Be $false
+        Test-Path -Path "/u[A-Z]" | Should Be $false
+    }
+
+    It "Should return false when the Leaf pathtype is used on a directory" {
+        Test-Path -Path $testdirectory -PathType Leaf | Should Be $false
+    }
+
+    It "Should return true when the Leaf pathtype is used on an existing endpoint" {
+        Test-Path -Path $testfile -PathType Leaf | Should Be $true
+    }
+
+    It "Should return false when the Leaf pathtype is used on a nonexistant file" {
+        Test-Path -Path "aoeu" -PathType Leaf | Should Be $false
+    }
+
+    It "Should return true when the Leaf pathtype is used on a file using the Type alias instead of PathType" {
+        Test-Path -Path $testfile -Type Leaf | Should Be $true
+    }
+
+    It "Should be able to search multiple regular expressions using the include switch" {
+        Test-Path -Path "/usr/bin/*" -Include vi* | Should Be $true
+    }
+
+    It "Should be able to exclude a regular expression using the exclude switch" {
+        Test-Path -Path "/usr/bin/" -Exclude vi* | Should Be $true
+    }
+
+    It "Should be able to exclude multiple regular expressions using the exclude switch" {
+        # tests whether there's any files in the /usr directory that don't start with 'd' or 'g'
+        Test-Path -Path "/usr" -Exclude d*, g* | Should Be $true
+    }
+
+    It "Should return true if the syntax of the path is correct when using the IsValid switch" {
+        Test-Path -Path /this/is/a/valid/path -IsValid | Should Be $true
+    }
+
+    It "Should return false if the syntax of the path is incorrect when using the IsValid switch" {
+        Test-Path -Path C:/usr/bin -IsValid | Should Be $false
+    }
+
+    It "Should return true on paths containing spaces when the path is surrounded in quotes" {
+        Test-Path -Path "/totally a valid/path" -IsValid | Should Be $true
+    }
+
+    It "Should throw on paths containing spaces when the path is not surrounded in quotes" {
+        { Test-Path -Path /a path/without quotes/around/it -IsValid } | Should Throw
+    }
+
+    It "Should return true if a directory leads or trails with a space when surrounded by quotes" {
+        Test-Path -Path "/a path / with/funkyspaces" -IsValid | Should Be $true
+    }
+
+    It "Should return true on a valid path when the LiteralPath switch is used" {
+        Test-Path -LiteralPath "/usr/bin" | Should Be $true
+    }
+
+    It "Should return false if regular expressions are used with the LiteralPath switch" {
+        Test-Path -LiteralPath /*sr/bin | Should Be $false
+        Test-Path -LiteralPath /[usth]sr/bin | Should Be $false
+    }
+
+    It "Should return false if regular expressions are used with the LiteralPath alias PSPath switch" {
+        Test-Path -PSPath /*sr/bin | Should Be $false
+        Test-Path -PSPath /[aoeu]sr/bin | Should Be $false
+    }
+
+    It "Should return true if used on components other than filesystem objects" {
+        Test-Path Alias:\gci    | Should Be $true
+        Test-Path Env:\HOSTNAME | Should Be $true
+    }
+}
diff --git a/src/ps_test/test_CorePsPlatform.cs b/src/ps_test/test_CorePsPlatform.cs
index 57e58bc32f..e11826091e 100644
--- a/src/ps_test/test_CorePsPlatform.cs
+++ b/src/ps_test/test_CorePsPlatform.cs
@@ -1,5 +1,6 @@
 using Xunit;
 using System;
+using System.IO;
 using System.Diagnostics;
 using System.Management.Automation;
 
@@ -90,5 +91,48 @@ namespace PSTests
 
 
         }
+
+        [Fact]
+        public static void TestExistantFileIsHardLink()
+        {
+            string path = @"/tmp/MyTest";
+            if (!File.Exists(path))
+            {
+                File.Create(path);
+            }
+            // Create a file to write to using StreamWriter. 
+            // convert string to stream.  On Windows, this appears to be handled, but on *nix, 
+            // we apparently need to convert to UTF8.
+            byte[] byteArray    = System.Text.Encoding.UTF8.GetBytes(path);
+            MemoryStream stream = new MemoryStream(byteArray);
+
+            // Convert `path` string to FileSystemInfo data type. And now, it should return true
+            FileSystemInfo fd = new FileInfo(path);
+            Assert.True(Platform.NonWindowsIsHardLink(fd));
+        }
+
+        [Fact]
+        public static void TestDirectoryIsHardLink()
+        {
+            string path = @"/tmp";
+
+            // Convert `path` string to FileSystemInfo data type. And now, it should return true
+            FileSystemInfo fd = new FileInfo(path);
+            Assert.False(Platform.NonWindowsIsHardLink(fd));
+        }
+
+        [Fact]
+        public static void TestNonExistantIsHardLink()
+        {
+            // A file that should *never* exist on a test machine:
+            string path = @"/tmp/ThisFileShouldNotExistOnTestMachines";
+
+            // If the file exists, then there's a larger issue that needs to be looked at
+            Assert.False(File.Exists(path));
+
+            // Convert `path` string to FileSystemInfo data type. And now, it should return true
+            FileSystemInfo fd = new FileInfo(path);
+            Assert.False(Platform.NonWindowsIsHardLink(fd));
+        }
     }
 }
diff --git a/src/ps_test/test_Runspace.cs b/src/ps_test/test_Runspace.cs
new file mode 100644
index 0000000000..f9b4745eb9
--- /dev/null
+++ b/src/ps_test/test_Runspace.cs
@@ -0,0 +1,48 @@
+using Xunit;
+using System;
+using System.Management.Automation;
+using System.Management.Automation.Runspaces;
+
+namespace PSTests
+{
+    public static class RunspaceTests
+    {
+        [Fact]
+        public static void TestMethod()
+        {
+            InitialSessionState iss = InitialSessionState.CreateDefault2();
+
+            // NOTE: instantiate custom host myHost for the next line to capture stdout and stderr output
+            //       in addition to just the PSObjects
+            using (Runspace rs = RunspaceFactory.CreateRunspace(/*myHost,*/iss))
+            {
+                rs.Open();
+                using (PowerShell ps = PowerShell.Create())
+                {
+                    ps.Runspace = rs;
+
+                    string script = "get-process | select-object -first 3";
+                    ps.AddScript(script);
+
+                    // IMPORTANT NOTE: do not call AddCommand("out-host") here or
+                    // MergeMyResults, otherwise Invoke will not return any objects
+                    
+                    var results = ps.Invoke();
+
+                    // check that there are 3 captured objects
+                    int objCount = 0;
+                    foreach (var result in results)
+                    {
+                        // this is how an object would be captured here and looked at,
+                        // each result is a PSObject with the data from the pipeline
+                        ++objCount;
+                        Assert.NotNull(result);
+                    }
+                    Assert.Equal(3,objCount);
+                    ps.Dispose();
+                }
+            }
+        }
+    }
+}
+
diff --git a/src/ps_test/test_SecuritySupport.cs b/src/ps_test/test_SecuritySupport.cs
index 4c3b4b9b17..962dc66707 100644
--- a/src/ps_test/test_SecuritySupport.cs
+++ b/src/ps_test/test_SecuritySupport.cs
@@ -15,7 +15,9 @@ namespace PSTests
         [Fact]
         public static void TestCurrentDomain_ProcessExit()
         {
-            AmsiUtils.CurrentDomain_ProcessExit(null, EventArgs.Empty);
+            Assert.Throws<PlatformNotSupportedException>(delegate {
+                    AmsiUtils.CurrentDomain_ProcessExit(null, EventArgs.Empty);
+                });
         }
 
         [Fact]