diff --git a/tests/FSharp.Core.UnitTests/FSharp.Core.UnitTests.fsproj b/tests/FSharp.Core.UnitTests/FSharp.Core.UnitTests.fsproj
index 91c24d90293..ada7028030f 100644
--- a/tests/FSharp.Core.UnitTests/FSharp.Core.UnitTests.fsproj
+++ b/tests/FSharp.Core.UnitTests/FSharp.Core.UnitTests.fsproj
@@ -35,7 +35,7 @@
     <Compile Include="LibraryTestFx.fs" />
     <Compile Include="FSharp.Core\PrimTypes.fs" />
     <Compile Include="FSharp.Core\ComparersRegression.fs" />
-    <Compile Include="FSharp.Core\DiscrimantedUnionType.fs" />
+    <Compile Include="FSharp.Core\DiscriminatedUnionType.fs" />
     <Compile Include="FSharp.Core\RecordTypes.fs" />
     <Compile Include="FSharp.Core\OperatorsModule1.fs" />
     <Compile Include="FSharp.Core\OperatorsModule2.fs" />
diff --git a/tests/FSharp.Core.UnitTests/FSharp.Core/DiscrimantedUnionType.fs b/tests/FSharp.Core.UnitTests/FSharp.Core/DiscriminatedUnionType.fs
similarity index 100%
rename from tests/FSharp.Core.UnitTests/FSharp.Core/DiscrimantedUnionType.fs
rename to tests/FSharp.Core.UnitTests/FSharp.Core/DiscriminatedUnionType.fs