diff --git a/tests/Perspex.Markup.UnitTests/Perspex.Markup.UnitTests.csproj b/tests/Perspex.Markup.UnitTests/Perspex.Markup.UnitTests.csproj
index 7d00e0b6b6..185013373c 100644
--- a/tests/Perspex.Markup.UnitTests/Perspex.Markup.UnitTests.csproj
+++ b/tests/Perspex.Markup.UnitTests/Perspex.Markup.UnitTests.csproj
@@ -102,6 +102,7 @@
     <Compile Include="UnitTestSynchronizationContext.cs" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
diff --git a/tests/Perspex.Markup.UnitTests/app.config b/tests/Perspex.Markup.UnitTests/app.config
new file mode 100644
index 0000000000..fa66e8c206
--- /dev/null
+++ b/tests/Perspex.Markup.UnitTests/app.config
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="Moq" publicKeyToken="69f491c39445e920" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.2.1510.2205" newVersion="4.2.1510.2205" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
\ No newline at end of file
diff --git a/tests/Perspex.Styling.UnitTests/app.config b/tests/Perspex.Styling.UnitTests/app.config
index 20eb7befb3..faf47a1e52 100644
--- a/tests/Perspex.Styling.UnitTests/app.config
+++ b/tests/Perspex.Styling.UnitTests/app.config
@@ -14,6 +14,10 @@
         <assemblyIdentity name="System.Reactive.Linq" publicKeyToken="31bf3856ad364e35" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-2.2.5.0" newVersion="2.2.5.0" />
       </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="Moq" publicKeyToken="69f491c39445e920" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.2.1510.2205" newVersion="4.2.1510.2205" />
+      </dependentAssembly>
     </assemblyBinding>
   </runtime>
 </configuration>
\ No newline at end of file