diff --git a/tests/atlocal.in b/tests/atlocal.in
index 16e6fda8..649e0743 100644
--- a/tests/atlocal.in
+++ b/tests/atlocal.in
@@ -88,9 +88,3 @@ if env | grep '^POSIXLY_CORRECT=' >/dev/null; then
 else
   POSIXLY_CORRECT_IS_EXPORTED=false
 fi
-
-# Handle --compile-c-with-cxx here, once CXX and CXXFLAGS are known.
-if "$at_arg_compile_c_with_cxx"; then
-  CC=$CXX
-  CFLAGS=$CXXFLAGS
-fi