diff -ruN mpich/modules/json-c/CMakeLists.txt mpich-4.0.3/modules/json-c/CMakeLists.txt
--- mpich/modules/json-c/CMakeLists.txt	2023-01-18 10:35:56.712610706 +0800
+++ mpich-4.0.3/modules/json-c/CMakeLists.txt	2023-01-18 10:39:25.377219492 +0800
@@ -30,7 +30,6 @@
 if (CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING AND
    (NOT MSVC OR NOT (MSVC_VERSION LESS 1800)) # Tests need at least VS2013
    )
-add_subdirectory(tests)
 endif()
 
 # Set some packaging variables.
diff -ruN mpich/modules/json-c/configure.ac mpich-4.0.3/modules/json-c/configure.ac
--- mpich/modules/json-c/configure.ac	2023-01-18 10:35:56.723610563 +0800
+++ mpich-4.0.3/modules/json-c/configure.ac	2023-01-18 10:39:29.171175850 +0800
@@ -215,7 +215,6 @@
 AC_CONFIG_FILES([
 Makefile
 json-c.pc
-tests/Makefile
 json-c-uninstalled.pc
 ])
 
diff -ruN mpich/modules/json-c/Makefile.am mpich-4.0.3/modules/json-c/Makefile.am
--- mpich/modules/json-c/Makefile.am	2023-01-18 10:35:56.723610563 +0800
+++ mpich-4.0.3/modules/json-c/Makefile.am	2023-01-18 10:39:34.581113611 +0800
@@ -10,7 +10,7 @@
 	chmod -R u+w "$(distdir)/doc"
 	cd "$(distdir)" && doxygen
 
-SUBDIRS = . tests
+SUBDIRS = .
 
 if EMBEDDED_BUILD
 noinst_LTLIBRARIES = libjson-c.la
@@ -98,8 +98,7 @@
 	install-sh \
 	ltmain.sh \
 	missing \
-	test-driver \
-	tests/Makefile.in
+	test-driver
 JSON_CLEANFILES+= \
 	libtool \
 	stamp-h1 \
diff -ruN mpich/modules/json-c/Makefile.in mpich-4.0.3/modules/json-c/Makefile.in
--- mpich/modules/json-c/Makefile.in	2023-01-18 10:35:56.723610563 +0800
+++ mpich-4.0.3/modules/json-c/Makefile.in	2023-01-18 10:39:35.348104790 +0800
@@ -416,7 +416,7 @@
 ACLOCAL_AMFLAGS = -I autoconf-archive/m4
 EXTRA_DIST = README.md README.html config.h.win32 Doxyfile \
 	issues_closed_for_0.13.md
-SUBDIRS = . tests
+SUBDIRS = .
 @EMBEDDED_BUILD_TRUE@noinst_LTLIBRARIES = libjson-c.la
 @EMBEDDED_BUILD_FALSE@lib_LTLIBRARIES = libjson-c.la
 
@@ -471,7 +471,7 @@
 	json_config.h
 JSON_CLEANFILES = Makefile.in aclocal.m4 autom4te.cache/ compile \
 	config.guess config.h.in config.sub configure depcomp \
-	install-sh ltmain.sh missing test-driver tests/Makefile.in \
+	install-sh ltmain.sh missing test-driver \
 	libtool stamp-h1 stamp-h2
 ANDROID_CFLAGS = -I$(top_srcdir) -DHAVE_CONFIG_H
 all: config.h json_config.h