diff --git a/BuildAndTest.proj b/BuildAndTest.proj
index e8170649afc377e65de67bb167f38ec2208f67ef..a52bfaee728fa061ce4e3fa1285eb87a9189888d 100644
--- a/BuildAndTest.proj
+++ b/BuildAndTest.proj
@@ -11,6 +11,7 @@
     <RoslynSolution Condition="'$(RoslynSolution)' == ''">$(MSBuildThisFileDirectory)Roslyn.sln</RoslynSolution>
     <SamplesSolution>$(MSBuildThisFileDirectory)src\Samples\Samples.sln</SamplesSolution>
     <Configuration Condition="'$(Configuration)' ==''">Debug</Configuration>
+    <RunTestArgs>-nocache</RunTestArgs>
     <RunTestArgs Condition="'$(ManualTest)' == ''">$(RunTestArgs) -xml</RunTestArgs>
     <RunTestArgs Condition="'$(Test64)' == 'true'">$(RunTestArgs) -test64</RunTestArgs>
     <RunTestArgs Condition="'$(TestVsi)' == 'true'">$(RunTestArgs) -testVsi</RunTestArgs>