diff --git a/test/cfg/runtests.sh b/test/cfg/runtests.sh
index 3f2524c0e11..1ff731abe16 100755
--- a/test/cfg/runtests.sh
+++ b/test/cfg/runtests.sh
@@ -44,7 +44,7 @@ CPPCHECK_OPT=(
 CXX=g++
 CXX_OPT=("-fsyntax-only" "-w" "-std=c++2a")
 CC=gcc
-CC_OPT=("-fsyntax-only" "-w" "-Wimplicit-function-declaration" "-std=c11")
+CC_OPT=("-fsyntax-only" "-w" "-Wno-implicit-function-declaration" "-std=c11") # TODO: remove -Wno-implicit-function-declaration when warnings are fixed on MacOS
 
 function get_pkg_config_cflags {
     # TODO: get rid of the error enabling/disabling?