diff --git a/Tests/RunCMake/Instrumentation/RunCMakeTest.cmake b/Tests/RunCMake/Instrumentation/RunCMakeTest.cmake
index 17426d7e0a..ef3d6391e4 100644
--- a/Tests/RunCMake/Instrumentation/RunCMakeTest.cmake
+++ b/Tests/RunCMake/Instrumentation/RunCMakeTest.cmake
@@ -607,15 +607,11 @@ instrument(cmake-command-trace
   CHECK_SCRIPT check-trace-removed.cmake
 )
 
-# FIXME(#27984): FASTBuild long output test failure
-# FIXME(#279846): Watcom WMake unsupported file names
-if(NOT RunCMake_GENERATOR MATCHES "FASTBuild|Watcom WMake")
-  instrument(cmake-command-long-output
-    BUILD
-    CONFIGURE_ARGS "-DLONG_CUSTOM_COMMAND_OUTPUT=ON"
-    CHECK_SCRIPT check-long-output.cmake
-  )
-endif()
+instrument(cmake-command-long-output
+  BUILD
+  CONFIGURE_ARGS "-DLONG_CUSTOM_COMMAND_OUTPUT=ON"
+  CHECK_SCRIPT check-long-output.cmake
+)
 
 # Test capture output
 instrument(cmake-command-capture-output