diff --git a/samples/psa/its/overlay-entropy_not_secure.conf b/samples/psa/its/overlay-entropy_not_secure.conf
index f2ab17793542..e8eeddbcf92b 100644
--- a/samples/psa/its/overlay-entropy_not_secure.conf
+++ b/samples/psa/its/overlay-entropy_not_secure.conf
@@ -2,3 +2,4 @@
 
 CONFIG_TEST_RANDOM_GENERATOR=y
 CONFIG_TIMER_RANDOM_GENERATOR=y
+CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG_ALLOW_NON_CSPRNG=y
diff --git a/samples/psa/persistent_key/overlay-entropy_not_secure.conf b/samples/psa/persistent_key/overlay-entropy_not_secure.conf
index f2ab17793542..e8eeddbcf92b 100644
--- a/samples/psa/persistent_key/overlay-entropy_not_secure.conf
+++ b/samples/psa/persistent_key/overlay-entropy_not_secure.conf
@@ -2,3 +2,4 @@
 
 CONFIG_TEST_RANDOM_GENERATOR=y
 CONFIG_TIMER_RANDOM_GENERATOR=y
+CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG_ALLOW_NON_CSPRNG=y
diff --git a/tests/subsys/secure_storage/psa/crypto/overlay-secure_storage.conf b/tests/subsys/secure_storage/psa/crypto/overlay-secure_storage.conf
index e076008277b6..ed84c3043288 100644
--- a/tests/subsys/secure_storage/psa/crypto/overlay-secure_storage.conf
+++ b/tests/subsys/secure_storage/psa/crypto/overlay-secure_storage.conf
@@ -4,6 +4,7 @@ CONFIG_MAIN_STACK_SIZE=2048
 CONFIG_MBEDTLS=y
 CONFIG_TEST_RANDOM_GENERATOR=y
 CONFIG_TIMER_RANDOM_GENERATOR=y
+CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG_ALLOW_NON_CSPRNG=y
 # PSA Crypto needs some heap, but MINIMAL_LIBC has none by default.
 CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=2048
 CONFIG_MBEDTLS_PSA_CRYPTO_C=y
diff --git a/tests/subsys/secure_storage/psa/its/overlay-transform_default.conf b/tests/subsys/secure_storage/psa/its/overlay-transform_default.conf
index c743a735e4d5..7ed936966baa 100644
--- a/tests/subsys/secure_storage/psa/its/overlay-transform_default.conf
+++ b/tests/subsys/secure_storage/psa/its/overlay-transform_default.conf
@@ -1,6 +1,7 @@
 CONFIG_MBEDTLS=y
 CONFIG_TEST_RANDOM_GENERATOR=y
 CONFIG_TIMER_RANDOM_GENERATOR=y
+CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG_ALLOW_NON_CSPRNG=y
 # PSA Crypto needs some heap, but MINIMAL_LIBC has none by default.
 CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=2048
 CONFIG_MBEDTLS_PSA_CRYPTO_C=y