diff --git a/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj b/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj
index 2d26f092a9b..029ec14b0b4 100644
--- a/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj
+++ b/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj
@@ -34,7 +34,6 @@
     <Compile Include="CompilerDirectives\Line.fs" />
     <Compile Include="CompilerDirectives\Ifdef.fs" />
     <Compile Include="CompilerDirectives\NonStringArgs.fs" />
-    <Compile Include="CompilerDirectives\Ifdef.fs" />
     <Compile Include="Conformance\BasicGrammarElements\AccessibilityAnnotations\Basic\Basic.fs" />
     <Compile Include="Conformance\BasicGrammarElements\AccessibilityAnnotations\OnOverridesAndIFaceImpl\OnOverridesAndIFaceImpl.fs" />
     <Compile Include="Conformance\BasicGrammarElements\AccessibilityAnnotations\OnTypeMembers\OnTypeMembers.fs" />