diff --git a/src/Common.Dotnet.FuzzTest.props b/src/Common.Dotnet.FuzzTest.props
index b3dbb32758..c9d94c7fff 100644
--- a/src/Common.Dotnet.FuzzTest.props
+++ b/src/Common.Dotnet.FuzzTest.props
@@ -7,4 +7,13 @@
   <PropertyGroup>
     <TargetFramework>net8.0-windows10.0.26100.0</TargetFramework>
   </PropertyGroup>
+
+  <!--
+    In CI, the main build runs `/t:Build;Test` across the full solution.
+    Fuzz test projects are built for OneFuzz ingestion, but should not be
+    executed as regular MSTest tests in this pass.
+  -->
+  <PropertyGroup Condition="'$(TF_BUILD)' != ''">
+    <TestingPlatformDisableCustomTestTarget>true</TestingPlatformDisableCustomTestTarget>
+  </PropertyGroup>
 </Project>