Index: Fortran/UnitTests/fcvs21_f95/CMakeLists.txt
===================================================================
--- Fortran/UnitTests/fcvs21_f95/CMakeLists.txt
+++ Fortran/UnitTests/fcvs21_f95/CMakeLists.txt
@@ -46,6 +46,7 @@
 endif()
 
 set(FP_TOLERANCE 1.0e-11) # set by the most sensitive numerical test
+set(FP_IGNOREWHITESPACE ON) # list-directed output has flexible whitespace
 llvm_singlesource()
 
 file(COPY lit.local.cfg DESTINATION "${CMAKE_CURRENT_BINARY_DIR}")
Index: cmake/modules/SingleMultiSource.cmake
===================================================================
--- cmake/modules/SingleMultiSource.cmake
+++ cmake/modules/SingleMultiSource.cmake
@@ -128,6 +128,9 @@
     if(FP_ABSTOLERANCE)
       set(DIFFPROG "${DIFFPROG} -a ${FP_ABSTOLERANCE}")
     endif()
+    if(FP_IGNOREWHITESPACE)
+      set(DIFFPROG "${DIFFPROG} -i")
+    endif()
     llvm_test_verify(${DIFFPROG} %o %S/${REFERENCE_OUTPUT})
     llvm_test_data(${target} ${REFERENCE_OUTPUT})
   endif()