diff --git a/cmake/Modules/SetSwiftestFlags.cmake b/cmake/Modules/SetSwiftestFlags.cmake
index d49f42245..4e716cce4 100644
--- a/cmake/Modules/SetSwiftestFlags.cmake
+++ b/cmake/Modules/SetSwiftestFlags.cmake
@@ -412,10 +412,6 @@ IF (CMAKE_BUILD_TYPE STREQUAL "DEBUG" OR CMAKE_BUILD_TYPE STREQUAL "TESTING" )
         SET_COMPILE_FLAG(CMAKE_Fortran_FLAGS_DEBUG "${CMAKE_Fortran_FLAGS_DEBUG}"
             Fortran "-Wno-unused-dummy-argument" # GNU
         )
-        # Tells the compiler to issue compile-time messages for nonstandard language elements (Fortran 2018).    
-        SET_COMPILE_FLAG(CMAKE_Fortran_FLAGS_DEBUG "${CMAKE_Fortran_FLAGS_DEBUG}"
-            Fortran "-fstd=f2018" # GNU
-        )  
         # Traceback
         SET_COMPILE_FLAG(CMAKE_Fortran_FLAGS_DEBUG "${CMAKE_Fortran_FLAGS_DEBUG}"
             Fortran "-fbacktrace"  # GNU (gfortran)