diff --git a/build/dependencies.props b/build/dependencies.props
index f0fb492a97..4076be8f45 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -70,7 +70,6 @@
     <SystemIOFileSystemAccessControlPackageVersion>4.5.0-preview2-26130-01</SystemIOFileSystemAccessControlPackageVersion>
     <SystemIOPackagingPackageVersion>4.5.0-preview2-26130-01</SystemIOPackagingPackageVersion>
     <SystemIOPipelinesPackageVersion>0.1.0-preview2-180130-1</SystemIOPipelinesPackageVersion>
-    <SystemIOPipelinesTestingPackageVersion>0.1.0-preview2-180130-1</SystemIOPipelinesTestingPackageVersion>
     <SystemIOPipesAccessControlPackageVersion>4.5.0-preview2-26130-01</SystemIOPipesAccessControlPackageVersion>
     <SystemIOPortsPackageVersion>4.5.0-preview2-26130-01</SystemIOPortsPackageVersion>
     <SystemJsonPackageVersion>4.5.0-preview2-26130-01</SystemJsonPackageVersion>
diff --git a/build/external-dependencies.props b/build/external-dependencies.props
index 14b3534493..66986909ad 100644
--- a/build/external-dependencies.props
+++ b/build/external-dependencies.props
@@ -116,7 +116,6 @@
   <ItemGroup>
     <ExternalDependency Include="System.Buffers.Primitives" Version="$(SystemBuffersPrimitivesPackageVersion)" Source="$(CoreFxLabFeed)" Mirror="true" />
     <ExternalDependency Include="System.IO.Pipelines" Version="$(SystemIOPipelinesPackageVersion)" Source="$(CoreFxLabFeed)" Mirror="true" />
-    <ExternalDependency Include="System.IO.Pipelines.Testing" Version="$(SystemIOPipelinesTestingPackageVersion)" Source="$(CoreFxLabFeed)" Mirror="true" />
     <ExternalDependency Include="System.Text.Encodings.Web.Utf8" Version="$(SystemTextEncodingsWebUtf8PackageVersion)" Source="$(CoreFxLabFeed)" Mirror="true" />
     <ExternalDependency Include="System.Text.Primitives" Version="$(SystemTextPrimitivesPackageVersion)" Source="$(CoreFxLabFeed)" Private="true" Mirror="true" />
   </ItemGroup>