diff --git a/Tests/CMakeTests/ProcessorCountTest.cmake.in b/Tests/CMakeTests/ProcessorCountTest.cmake.in
index 15e021948..f92dcc44c 100644
--- a/Tests/CMakeTests/ProcessorCountTest.cmake.in
+++ b/Tests/CMakeTests/ProcessorCountTest.cmake.in
@@ -12,7 +12,14 @@ execute_process(
   COMMAND "${KWSYS_TEST_EXE}"
   testSystemInformation
   OUTPUT_VARIABLE tsi_out
-  ERROR_VARIABLE tsi_err)
+  ERROR_VARIABLE tsi_err
+  RESULT_VARIABLE tsi_res
+)
+if (tsi_res)
+  message("executing \"${KWSYS_TEST_EXE}\" failed")
+  message(FATAL_ERROR "output: ${tsi_res}")
+endif ()
+
 string(REGEX REPLACE "(.*)GetNumberOfPhysicalCPU:.([0-9]*)(.*)" "\\2"
   system_info_processor_count "${tsi_out}")