diff --git a/programs/fuzz/onefile.c b/programs/fuzz/onefile.c
index 9e3986d..c845149 100644
--- a/programs/fuzz/onefile.c
+++ b/programs/fuzz/onefile.c
@@ -1,8 +1,15 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
-// Get platform-specific definition
+
+/* This file doesn't use any Mbed TLS function, but grab config.h anyway
+ * in case it contains platform-specific #defines related to malloc or
+ * stdio functions. */
+#if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
 
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index e49277a..6017680 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1030,6 +1030,26 @@
 component_test_make_shared () {
     msg "build/test: make shared" # ~ 40s
     make SHARED=1 all check -j1
+    ldd programs/util/strerror | grep libmbedcrypto
+}
+
+component_test_cmake_shared () {
+    msg "build/test: cmake shared" # ~ 2min
+    cmake -DUSE_SHARED_MBEDTLS_LIBRARY=On .
+    make
+    ldd programs/util/strerror | grep libmbedcrypto
+    make test
+}
+
+component_build_mbedtls_config_file () {
+    msg "build: make with MBEDTLS_CONFIG_FILE" # ~40s
+    # Use the full config so as to catch a maximum of places where
+    # the check of MBEDTLS_CONFIG_FILE might be missing.
+    scripts/config.pl full
+    sed 's!"check_config.h"!"mbedtls/check_config.h"!' <"$CONFIG_H" >full_config.h
+    echo '#error "MBEDTLS_CONFIG_FILE is not working"' >"$CONFIG_H"
+    make CFLAGS="-I '$PWD' -DMBEDTLS_CONFIG_FILE='\"full_config.h\"'"
+    rm -f full_config.h
 }
 
 component_test_m32_o0 () {