Index: Migration/Scripts/test/Migration.Scripts.Data.Test/FileMigrationScriptTest.cs
===================================================================
diff -u -r9339a780307cdb21ebe38cbd3aa8811e2c98d980 -rf9ebe14093d244d45113211f5d9ac9a7e75ecf0c
--- Migration/Scripts/test/Migration.Scripts.Data.Test/FileMigrationScriptTest.cs	(.../FileMigrationScriptTest.cs)	(revision 9339a780307cdb21ebe38cbd3aa8811e2c98d980)
+++ Migration/Scripts/test/Migration.Scripts.Data.Test/FileMigrationScriptTest.cs	(.../FileMigrationScriptTest.cs)	(revision f9ebe14093d244d45113211f5d9ac9a7e75ecf0c)
@@ -22,8 +22,8 @@
 using System;
 using Core.Common.TestUtil;
 using Migration.Scripts.Data.TestUtil;
+using NSubstitute;
 using NUnit.Framework;
-using Rhino.Mocks;
 
 namespace Migration.Scripts.Data.Test
 {
@@ -95,10 +95,8 @@
             // Setup
             string filePath = TestHelper.GetScratchPadPath(nameof(Upgrade_ValidParameters_ExpectedProperties));
 
-            var mockRepository = new MockRepository();
-            var versionedFile = mockRepository.Stub<IVersionedFile>();
-            versionedFile.Expect(vf => vf.Location).Return(filePath);
-            mockRepository.ReplayAll();
+            var versionedFile = Substitute.For<IVersionedFile>();
+            versionedFile.Location.Returns(filePath);
 
             var createScript = new TestCreateScript("2");
             var upgradeScript = new TestUpgradeScript("1", "2");
@@ -113,7 +111,7 @@
                 Assert.IsNotNull(upgradedFile);
             }
 
-            mockRepository.VerifyAll();
+            _ = versionedFile.Received().Location;
         }
     }
 }
\ No newline at end of file
Index: Migration/Scripts/test/Migration.Scripts.Data.Test/Migration.Scripts.Data.Test.csproj
===================================================================
diff -u -r08e8d26a0715f0f3db57c1d3e86256aa06934db4 -rf9ebe14093d244d45113211f5d9ac9a7e75ecf0c
--- Migration/Scripts/test/Migration.Scripts.Data.Test/Migration.Scripts.Data.Test.csproj	(.../Migration.Scripts.Data.Test.csproj)	(revision 08e8d26a0715f0f3db57c1d3e86256aa06934db4)
+++ Migration/Scripts/test/Migration.Scripts.Data.Test/Migration.Scripts.Data.Test.csproj	(.../Migration.Scripts.Data.Test.csproj)	(revision f9ebe14093d244d45113211f5d9ac9a7e75ecf0c)
@@ -18,8 +18,11 @@
     <PackageReference Include="NUnit">
       <Version>3.8.1</Version>
     </PackageReference>
-    <PackageReference Include="RhinoMocks">
-      <Version>3.6.1</Version>
+    <PackageReference Include="NSubstitute">
+      <Version>4.4.0</Version>
     </PackageReference>
+    <PackageReference Include="NSubstitute.Analyzers.CSharp">
+      <Version>1.0.16</Version>
+    </PackageReference>
   </ItemGroup>
 </Project>
\ No newline at end of file