diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 05d413ba17..3eba418d12 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1661,7 +1661,7 @@ component_test_default_no_deprecated () {
     # configuration leaves something consistent.
     msg "build: make, default + MBEDTLS_DEPRECATED_REMOVED" # ~ 30s
     scripts/config.py set MBEDTLS_DEPRECATED_REMOVED
-    make CC=gcc CFLAGS='-O -Werror -Wall -Wextra'
+    make CFLAGS='-O -Werror -Wall -Wextra'
 
     msg "test: make, default + MBEDTLS_DEPRECATED_REMOVED" # ~ 5s
     make test
@@ -1670,7 +1670,7 @@ component_test_default_no_deprecated () {
 component_test_full_no_deprecated () {
     msg "build: make, full_no_deprecated config" # ~ 30s
     scripts/config.py full_no_deprecated
-    make CC=gcc CFLAGS='-O -Werror -Wall -Wextra'
+    make CFLAGS='-O -Werror -Wall -Wextra'
 
     msg "test: make, full_no_deprecated config" # ~ 5s
     make test
@@ -1684,7 +1684,7 @@ component_test_full_no_deprecated_deprecated_warning () {
     scripts/config.py full_no_deprecated
     scripts/config.py unset MBEDTLS_DEPRECATED_REMOVED
     scripts/config.py set MBEDTLS_DEPRECATED_WARNING
-    make CC=gcc CFLAGS='-O -Werror -Wall -Wextra'
+    make CFLAGS='-O -Werror -Wall -Wextra'
 
     msg "test: make, full_no_deprecated config, MBEDTLS_DEPRECATED_WARNING" # ~ 5s
     make test
@@ -1697,14 +1697,14 @@ component_test_full_deprecated_warning () {
     scripts/config.py full
     scripts/config.py set MBEDTLS_DEPRECATED_WARNING
     # Expect warnings from '#warning' directives in check_config.h.
-    make CC=gcc CFLAGS='-O -Werror -Wall -Wextra -Wno-error=cpp' lib programs
+    make CFLAGS='-O -Werror -Wall -Wextra -Wno-error=cpp' lib programs
 
     msg "build: make tests, full config + MBEDTLS_DEPRECATED_WARNING, expect warnings" # ~ 30s
     # Set MBEDTLS_TEST_DEPRECATED to enable tests for deprecated features.
     # By default those are disabled when MBEDTLS_DEPRECATED_WARNING is set.
     # Expect warnings from '#warning' directives in check_config.h and
     # from the use of deprecated functions in test suites.
-    make CC=gcc CFLAGS='-O -Werror -Wall -Wextra -Wno-error=deprecated-declarations -Wno-error=cpp -DMBEDTLS_TEST_DEPRECATED' tests
+    make CFLAGS='-O -Werror -Wall -Wextra -Wno-error=deprecated-declarations -Wno-error=cpp -DMBEDTLS_TEST_DEPRECATED' tests
 
     msg "test: full config + MBEDTLS_TEST_DEPRECATED" # ~ 30s
     make test
@@ -1866,7 +1866,7 @@ component_build_no_pk_rsa_alt_support () {
     scripts/config.py set MBEDTLS_X509_CRT_WRITE_C
 
     # Only compile - this is primarily to test for compile issues
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra -I../tests/include/alt-dummy'
+    make CFLAGS='-Werror -Wall -Wextra -I../tests/include/alt-dummy'
 }
 
 component_test_no_use_psa_crypto_full_cmake_asan() {
@@ -2623,7 +2623,7 @@ component_test_memory_buffer_allocator_backtrace () {
     scripts/config.py set MBEDTLS_PLATFORM_MEMORY
     scripts/config.py set MBEDTLS_MEMORY_BACKTRACE
     scripts/config.py set MBEDTLS_MEMORY_DEBUG
-    CC=gcc cmake -DCMAKE_BUILD_TYPE:String=Release .
+    cmake -DCMAKE_BUILD_TYPE:String=Release .
     make
 
     msg "test: MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE"
@@ -2634,7 +2634,7 @@ component_test_memory_buffer_allocator () {
     msg "build: default config with memory buffer allocator"
     scripts/config.py set MBEDTLS_MEMORY_BUFFER_ALLOC_C
     scripts/config.py set MBEDTLS_PLATFORM_MEMORY
-    CC=gcc cmake -DCMAKE_BUILD_TYPE:String=Release .
+    cmake -DCMAKE_BUILD_TYPE:String=Release .
     make
 
     msg "test: MBEDTLS_MEMORY_BUFFER_ALLOC_C"
@@ -2749,7 +2749,7 @@ component_test_ssl_alloc_buffer_and_mfl () {
     scripts/config.py set MBEDTLS_MEMORY_DEBUG
     scripts/config.py set MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
     scripts/config.py set MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
-    CC=gcc cmake -DCMAKE_BUILD_TYPE:String=Release .
+    cmake -DCMAKE_BUILD_TYPE:String=Release .
     make
 
     msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH, MBEDTLS_MEMORY_BUFFER_ALLOC_C, MBEDTLS_MEMORY_DEBUG and MBEDTLS_SSL_MAX_FRAGMENT_LENGTH"
@@ -2849,7 +2849,7 @@ component_test_malloc_0_null () {
 component_test_aes_fewer_tables () {
     msg "build: default config with AES_FEWER_TABLES enabled"
     scripts/config.py set MBEDTLS_AES_FEWER_TABLES
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra'
+    make CFLAGS='-Werror -Wall -Wextra'
 
     msg "test: AES_FEWER_TABLES"
     make test
@@ -2858,7 +2858,7 @@ component_test_aes_fewer_tables () {
 component_test_aes_rom_tables () {
     msg "build: default config with AES_ROM_TABLES enabled"
     scripts/config.py set MBEDTLS_AES_ROM_TABLES
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra'
+    make CFLAGS='-Werror -Wall -Wextra'
 
     msg "test: AES_ROM_TABLES"
     make test
@@ -2868,7 +2868,7 @@ component_test_aes_fewer_tables_and_rom_tables () {
     msg "build: default config with AES_ROM_TABLES and AES_FEWER_TABLES enabled"
     scripts/config.py set MBEDTLS_AES_FEWER_TABLES
     scripts/config.py set MBEDTLS_AES_ROM_TABLES
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra'
+    make CFLAGS='-Werror -Wall -Wextra'
 
     msg "test: AES_FEWER_TABLES + AES_ROM_TABLES"
     make test
@@ -3549,7 +3549,7 @@ component_build_zeroize_checks () {
     scripts/config.py full
 
     # Only compile - we're looking for sizeof-pointer-memaccess warnings
-    make CC=gcc CFLAGS="'-DMBEDTLS_USER_CONFIG_FILE=\"../tests/configs/user-config-zeroize-memset.h\"' -DMBEDTLS_TEST_DEFINES_ZEROIZE -Werror -Wsizeof-pointer-memaccess"
+    make CFLAGS="'-DMBEDTLS_USER_CONFIG_FILE=\"../tests/configs/user-config-zeroize-memset.h\"' -DMBEDTLS_TEST_DEFINES_ZEROIZE -Werror -Wsizeof-pointer-memaccess"
 }