diff --git a/tests/unit/test_alert_rules/test_smart.yaml b/tests/unit/test_alert_rules/test_smart.yaml
index 8e07ad12..28169558 100644
--- a/tests/unit/test_alert_rules/test_smart.yaml
+++ b/tests/unit/test_alert_rules/test_smart.yaml
@@ -168,7 +168,7 @@ tests:
 
   - interval: 1m
     input_series:
-      - series: 'smartctl_device_attribute{device="sda", attribute_id="5", attribute_name="Reallocated_Sectors_Count", instance="ubuntu-2"}'
+      - series: 'smartctl_device_attribute{device="sda", attribute_id="5", attribute_name="Reallocated_Sectors_Count", instance="ubuntu-2", attribute_value_type="raw"}'
         values: '2x10'
 
     alert_rule_test:
@@ -230,4 +230,4 @@ tests:
                 The NVMe drive has reached 90% of its estimated lifetime.
                 Note: A value of 100 does not indicate failure. For more details, visit https://charmhub.io/hardware-observer/docs/metrics-and-alerts-smart
                   VALUE = 95
-                  LABELS = map[__name__:smartctl_device_percentage_used device:nvme instance:ubuntu-4]
\ No newline at end of file
+                  LABELS = map[__name__:smartctl_device_percentage_used device:nvme instance:ubuntu-4]