diff --git a/tests/subsys/secure_storage/psa/its/overlay-default_store.conf b/tests/subsys/secure_storage/psa/its/overlay-default_store.conf
deleted file mode 100644
index 584a2d08feb..00000000000
--- a/tests/subsys/secure_storage/psa/its/overlay-default_store.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-# Limit the space available for the maximum entry test to not take too long.
-CONFIG_SETTINGS_NVS_SECTOR_COUNT=2
diff --git a/tests/subsys/secure_storage/psa/its/overlay-custom_store.conf b/tests/subsys/secure_storage/psa/its/overlay-store_custom.conf
similarity index 100%
rename from tests/subsys/secure_storage/psa/its/overlay-custom_store.conf
rename to tests/subsys/secure_storage/psa/its/overlay-store_custom.conf
diff --git a/tests/subsys/secure_storage/psa/its/overlay-store_settings.conf b/tests/subsys/secure_storage/psa/its/overlay-store_settings.conf
new file mode 100644
index 00000000000..e6604bc94b0
--- /dev/null
+++ b/tests/subsys/secure_storage/psa/its/overlay-store_settings.conf
@@ -0,0 +1,7 @@
+CONFIG_SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_SETTINGS=y
+
+# 256 - flags (1) - CONFIG_SECURE_STORAGE_ITS_TRANSFORM_OUTPUT_OVERHEAD (28)
+CONFIG_SECURE_STORAGE_ITS_MAX_DATA_SIZE=227
+
+# Limit the space available for the maximum entry test to not take too long with NVS.
+CONFIG_SETTINGS_NVS_SECTOR_COUNT=2
diff --git a/tests/subsys/secure_storage/psa/its/overlay-custom_transform.conf b/tests/subsys/secure_storage/psa/its/overlay-transform_custom.conf
similarity index 57%
rename from tests/subsys/secure_storage/psa/its/overlay-custom_transform.conf
rename to tests/subsys/secure_storage/psa/its/overlay-transform_custom.conf
index 8a95663d98a..2d845b7321b 100644
--- a/tests/subsys/secure_storage/psa/its/overlay-custom_transform.conf
+++ b/tests/subsys/secure_storage/psa/its/overlay-transform_custom.conf
@@ -1,5 +1,4 @@
 CONFIG_SECURE_STORAGE_ITS_TRANSFORM_IMPLEMENTATION_CUSTOM=y
 CONFIG_SECURE_STORAGE_ITS_TRANSFORM_OUTPUT_OVERHEAD=0
 
-# SETTINGS_MAX_VAL_LEN (256) - flags (1)
-CONFIG_SECURE_STORAGE_ITS_MAX_DATA_SIZE=255
+CONFIG_SECURE_STORAGE_ITS_MAX_DATA_SIZE=500
diff --git a/tests/subsys/secure_storage/psa/its/overlay-default_transform.conf b/tests/subsys/secure_storage/psa/its/overlay-transform_default.conf
similarity index 60%
rename from tests/subsys/secure_storage/psa/its/overlay-default_transform.conf
rename to tests/subsys/secure_storage/psa/its/overlay-transform_default.conf
index dd304107309..c743a735e4d 100644
--- a/tests/subsys/secure_storage/psa/its/overlay-default_transform.conf
+++ b/tests/subsys/secure_storage/psa/its/overlay-transform_default.conf
@@ -5,5 +5,4 @@ CONFIG_TIMER_RANDOM_GENERATOR=y
 CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=2048
 CONFIG_MBEDTLS_PSA_CRYPTO_C=y
 
-# SETTINGS_MAX_VAL_LEN (256) - flags (1) - CONFIG_SECURE_STORAGE_ITS_TRANSFORM_OUTPUT_OVERHEAD (28)
-CONFIG_SECURE_STORAGE_ITS_MAX_DATA_SIZE=227
+CONFIG_SECURE_STORAGE_ITS_MAX_DATA_SIZE=300
diff --git a/tests/subsys/secure_storage/psa/its/testcase.yaml b/tests/subsys/secure_storage/psa/its/testcase.yaml
index c59c58532b4..b3dce34dd18 100644
--- a/tests/subsys/secure_storage/psa/its/testcase.yaml
+++ b/tests/subsys/secure_storage/psa/its/testcase.yaml
@@ -1,42 +1,45 @@
 common:
   integration_platforms:
     - native_sim
+    - nrf54l15dk/nrf54l15/cpuapp
   platform_exclude:
     - qemu_cortex_m0 # settings subsystem initialization fails
   timeout: 600
   tags:
     - psa.secure_storage
 tests:
-  secure_storage.psa.its.secure_storage:
-    filter: CONFIG_SECURE_STORAGE and not CONFIG_SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_NONE
+  secure_storage.psa.its.secure_storage.zms:
+    # DT-based filtering is not possible for this test scenario.
+    # Platforms with a storage_partition must be manually added here.
+    platform_allow: native_sim mps2/an385 qemu_x86/atom qemu_x86_64/atom
+      nrf54l15dk/nrf54l15/cpuapp nrf5340dk/nrf5340/cpuapp nrf52840dk/nrf52840
+      nrf9151dk/nrf9151 nrf9160dk/nrf9160 nrf9161dk/nrf9161
+    extra_args:
+      - EXTRA_DTC_OVERLAY_FILE=zms.overlay
+      - EXTRA_CONF_FILE=overlay-secure_storage.conf;overlay-transform_default.conf
+      - CONFIG_SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_ZMS=y
+
+  secure_storage.psa.its.secure_storage.settings.nvs:
+    filter: CONFIG_SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_SETTINGS
     extra_args: "EXTRA_CONF_FILE=\
-      overlay-secure_storage.conf;overlay-default_transform.conf;overlay-default_store.conf"
-    integration_platforms:
-      - native_sim
-      - nrf54l15dk/nrf54l15/cpuapp
+      overlay-secure_storage.conf;overlay-transform_default.conf;overlay-store_settings.conf"
+
   secure_storage.psa.its.secure_storage.custom.transform:
     filter: CONFIG_SECURE_STORAGE and not CONFIG_SECURE_STORAGE_ITS_STORE_IMPLEMENTATION_NONE
-    extra_args: "EXTRA_CONF_FILE=\
-      overlay-secure_storage.conf;overlay-custom_transform.conf;overlay-default_store.conf"
-    integration_platforms:
-      - native_sim
-      - nrf54l15dk/nrf54l15/cpuapp
+    extra_args: EXTRA_CONF_FILE=overlay-secure_storage.conf;overlay-transform_custom.conf
+
   secure_storage.psa.its.secure_storage.custom.store:
     filter: CONFIG_SECURE_STORAGE
     extra_args: "EXTRA_CONF_FILE=\
-      overlay-secure_storage.conf;overlay-default_transform.conf;overlay-custom_store.conf"
-    integration_platforms:
-      - native_sim
-      - nrf54l15dk/nrf54l15/cpuapp
+      overlay-secure_storage.conf;overlay-transform_default.conf;overlay-store_custom.conf"
+
   secure_storage.psa.its.secure_storage.custom.both:
     filter: CONFIG_SECURE_STORAGE
     extra_args: "EXTRA_CONF_FILE=\
-      overlay-secure_storage.conf;overlay-custom_transform.conf;overlay-custom_store.conf"
-    integration_platforms:
-      - native_sim
-      - nrf54l15dk/nrf54l15/cpuapp
+      overlay-secure_storage.conf;overlay-transform_custom.conf;overlay-store_custom.conf"
+
   secure_storage.psa.its.tfm:
     filter: CONFIG_BUILD_WITH_TFM
-    extra_args: EXTRA_CONF_FILE=overlay-tfm.conf
     integration_platforms:
       - nrf9151dk/nrf9151/ns
+    extra_args: EXTRA_CONF_FILE=overlay-tfm.conf
diff --git a/tests/subsys/secure_storage/psa/its/zms.overlay b/tests/subsys/secure_storage/psa/its/zms.overlay
new file mode 100644
index 00000000000..6a739db514c
--- /dev/null
+++ b/tests/subsys/secure_storage/psa/its/zms.overlay
@@ -0,0 +1,5 @@
+/ {
+	chosen {
+		secure_storage_its_partition = &storage_partition;
+	};
+};