diff --git a/tests/subsys/secure_storage/psa/its/testcase.yaml b/tests/subsys/secure_storage/psa/its/testcase.yaml
index bf72516e4b2..d464a82e8e9 100644
--- a/tests/subsys/secure_storage/psa/its/testcase.yaml
+++ b/tests/subsys/secure_storage/psa/its/testcase.yaml
@@ -26,6 +26,7 @@ tests:
     extra_args:
       - EXTRA_DTC_OVERLAY_FILE=zms.overlay
       - EXTRA_CONF_FILE=overlay-secure_storage.conf;overlay-transform_default.conf
+      - SB_CONFIG_PARTITION_MANAGER=n
 
   secure_storage.psa.its.secure_storage.store.settings:
     filter: CONFIG_SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_SETTINGS