diff --git a/unittests/deployment/deployment.yaml b/unittests/deployment/deployment.yaml
index 606fa9d..6e9ab7f 100644
--- a/unittests/deployment/deployment.yaml
+++ b/unittests/deployment/deployment.yaml
@@ -83,6 +83,9 @@ tests:
       path: spec.template.spec.restartPolicy
   - notExists:
       path: spec.template.spec.subdomain
+  - equal:
+      path: spec.template.spec.terminationGracePeriodSeconds
+      value: 60
 
 - it: Test additional arguments
   set:
@@ -293,6 +296,14 @@ tests:
       path: spec.template.spec.restartPolicy
       value: Always
 
+- it: Test terminationGracePeriodSeconds
+  set:
+    deployment.terminationGracePeriodSeconds: 120
+  asserts:
+  - equal:
+      path: spec.template.spec.terminationGracePeriodSeconds
+      value: 120
+
 - it: Test additional volumeMounts and volumes
   set:
     deployment.postgresExporter.volumeMounts: