diff --git a/tests/scripts/components-platform.sh b/tests/scripts/components-platform.sh
index 54abb8a..4afa89d 100644
--- a/tests/scripts/components-platform.sh
+++ b/tests/scripts/components-platform.sh
@@ -9,3 +9,113 @@
 #### Platform Testing
 ################################################################
 
+component_test_malloc_0_null () {
+    msg "build: malloc(0) returns NULL (ASan+UBSan build)"
+    scripts/config.py full
+    make CC=$ASAN_CC CFLAGS="'-DMBEDTLS_USER_CONFIG_FILE=\"$PWD/tests/configs/user-config-malloc-0-null.h\"' $ASAN_CFLAGS" LDFLAGS="$ASAN_CFLAGS"
+
+    msg "test: malloc(0) returns NULL (ASan+UBSan build)"
+    make test
+
+    msg "selftest: malloc(0) returns NULL (ASan+UBSan build)"
+    # Just the calloc selftest. "make test" ran the others as part of the
+    # test suites.
+    programs/test/selftest calloc
+
+    msg "test ssl-opt.sh: malloc(0) returns NULL (ASan+UBSan build)"
+    # Run a subset of the tests. The choice is a balance between coverage
+    # and time (including time indirectly wasted due to flaky tests).
+    # The current choice is to skip tests whose description includes
+    # "proxy", which is an approximation of skipping tests that use the
+    # UDP proxy, which tend to be slower and flakier.
+    tests/ssl-opt.sh -e 'proxy'
+}
+
+component_test_m32_no_asm () {
+    # Build without assembly, so as to use portable C code (in a 32-bit
+    # build) and not the i386-specific inline assembly.
+    #
+    # Note that we require gcc, because clang Asan builds fail to link for
+    # this target (cannot find libclang_rt.lsan-i386.a - this is a known clang issue).
+    msg "build: i386, make, gcc, no asm (ASan build)" # ~ 30s
+    scripts/config.py full
+    scripts/config.py unset MBEDTLS_HAVE_ASM
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI for 32-bit is tested in test_aesni_m32
+    make CC=gcc CFLAGS="$ASAN_CFLAGS -m32" LDFLAGS="-m32 $ASAN_CFLAGS"
+
+    msg "test: i386, make, gcc, no asm (ASan build)"
+    make test
+}
+
+support_test_m32_no_asm () {
+    case $(uname -m) in
+        amd64|x86_64) true;;
+        *) false;;
+    esac
+}
+
+component_test_m32_o2 () {
+    # Build with optimization, to use the i386 specific inline assembly
+    # and go faster for tests.
+    msg "build: i386, make, gcc -O2 (ASan build)" # ~ 30s
+    scripts/config.py full
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI for 32-bit is tested in test_aesni_m32
+    make CC=gcc CFLAGS="$ASAN_CFLAGS -m32" LDFLAGS="-m32 $ASAN_CFLAGS"
+
+    msg "test: i386, make, gcc -O2 (ASan build)"
+    make test
+
+    msg "test ssl-opt.sh, i386, make, gcc-O2"
+    tests/ssl-opt.sh
+}
+
+support_test_m32_o2 () {
+    support_test_m32_no_asm "$@"
+}
+
+component_test_m32_everest () {
+    msg "build: i386, Everest ECDH context (ASan build)" # ~ 6 min
+    scripts/config.py set MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED
+    scripts/config.py unset MBEDTLS_AESNI_C # AESNI for 32-bit is tested in test_aesni_m32
+    make CC=gcc CFLAGS="$ASAN_CFLAGS -m32" LDFLAGS="-m32 $ASAN_CFLAGS"
+
+    msg "test: i386, Everest ECDH context - main suites (inc. selftests) (ASan build)" # ~ 50s
+    make test
+
+    msg "test: i386, Everest ECDH context - ECDH-related part of ssl-opt.sh (ASan build)" # ~ 5s
+    tests/ssl-opt.sh -f ECDH
+
+    msg "test: i386, Everest ECDH context - compat.sh with some ECDH ciphersuites (ASan build)" # ~ 3 min
+    # Exclude some symmetric ciphers that are redundant here to gain time.
+    tests/compat.sh -f ECDH -V NO -e 'ARIA\|CAMELLIA\|CHACHA'
+}
+
+support_test_m32_everest () {
+    support_test_m32_no_asm "$@"
+}
+
+component_test_mx32 () {
+    msg "build: 64-bit ILP32, make, gcc" # ~ 30s
+    scripts/config.py full
+    make CC=gcc CFLAGS='-O2 -Werror -Wall -Wextra -mx32' LDFLAGS='-mx32'
+
+    msg "test: 64-bit ILP32, make, gcc"
+    make test
+}
+
+support_test_mx32 () {
+    case $(uname -m) in
+        amd64|x86_64) true;;
+        *) false;;
+    esac
+}
+
+component_build_zeroize_checks () {
+    msg "build: check for obviously wrong calls to mbedtls_platform_zeroize()"
+
+    scripts/config.py full
+
+    # Only compile - we're looking for sizeof-pointer-memaccess warnings
+    make CFLAGS="'-DMBEDTLS_USER_CONFIG_FILE=\"../tests/configs/user-config-zeroize-memset.h\"' -DMBEDTLS_TEST_DEFINES_ZEROIZE -Werror -Wsizeof-pointer-memaccess"
+}
+