diff --git a/eng/testing/tests.targets b/eng/testing/tests.targets
index 9b692a53c57677..b90176bd9bba2a 100644
--- a/eng/testing/tests.targets
+++ b/eng/testing/tests.targets
@@ -99,7 +99,7 @@
     <PropertyGroup>
       <RunTestsCommand>"$(RunScriptOutputPath)" --runtime-path "$(TestHostRootPath.TrimEnd('\/'))"</RunTestsCommand>
       <RunTestsCommand Condition="'$(TestRspFile)' != '' and '$(RuntimeFlavor)' != 'Mono'">$(RunTestsCommand) --rsp-file "$(TestRspFile)"</RunTestsCommand>
-      <RunTestsCommand Condition="'$(TargetsMobile)'">"$(RunScriptOutputPath)" $(AssemblyName) $(TargetArchitecture)</RunTestsCommand>
+      <RunTestsCommand Condition="'$(TargetsMobile)' == 'true'">"$(RunScriptOutputPath)" $(AssemblyName) $(TargetArchitecture)</RunTestsCommand>
     </PropertyGroup>
 
     <!-- Invoke the run script with the test host as the runtime path. -->