diff --git a/ext/lib/crypto/mbedtls/configs/config-tls-generic.h b/ext/lib/crypto/mbedtls/configs/config-tls-generic.h
index f09e745a737..6b9697a0d33 100644
--- a/ext/lib/crypto/mbedtls/configs/config-tls-generic.h
+++ b/ext/lib/crypto/mbedtls/configs/config-tls-generic.h
@@ -27,6 +27,7 @@
 #endif
 
 #if defined(CONFIG_MBEDTLS_TEST)
+#define MBEDTLS_SELF_TEST
 #define MBEDTLS_DEBUG_C
 #endif
 
diff --git a/tests/crypto/mbedtls/testcase.yaml b/tests/crypto/mbedtls/testcase.yaml
index d3b92d1c918..406f8ec77c7 100644
--- a/tests/crypto/mbedtls/testcase.yaml
+++ b/tests/crypto/mbedtls/testcase.yaml
@@ -1,7 +1,8 @@
 tests:
   crypto.mbedtls:
     filter: not CONFIG_DEBUG
-    min_flash: 33
+    platform_exclude: qemu_x86_64 # FIXME
+    min_flash: 65
     min_ram: 32
     tags: crypto mbedtls
     timeout: 200