diff --git a/charts/onechart/templates/extraDeploy.yaml b/charts/onechart/templates/extraDeploy.yaml
new file mode 100644
index 0000000..d6cec9e
--- /dev/null
+++ b/charts/onechart/templates/extraDeploy.yaml
@@ -0,0 +1,3 @@
+{{- if .Values.extraDeploy }}
+{{ .Values.extraDeploy }}
+{{- end }}
\ No newline at end of file
diff --git a/charts/onechart/tests/extraDeploy_test.yaml b/charts/onechart/tests/extraDeploy_test.yaml
new file mode 100644
index 0000000..4e284da
--- /dev/null
+++ b/charts/onechart/tests/extraDeploy_test.yaml
@@ -0,0 +1,57 @@
+suite: test service
+templates:
+  - extraDeploy.yaml
+tests:
+  - it: Should include additional yaml pieces
+    set:
+      extraDeploy: |
+        apiVersion: networking.k8s.io/v1
+        kind: NetworkPolicy
+        metadata:
+          name: test-network-policy
+          namespace: default
+        spec:
+          podSelector:
+            matchLabels:
+              role: db
+          policyTypes:
+            - Ingress
+            - Egress
+          ingress:
+            - from:
+                - ipBlock:
+                    cidr: 172.17.0.0/16
+                    except:
+                      - 172.17.1.0/24
+                - namespaceSelector:
+                    matchLabels:
+                      project: myproject
+                - podSelector:
+                    matchLabels:
+                      role: frontend
+              ports:
+                - protocol: TCP
+                  port: 6379
+          egress:
+            - to:
+                - ipBlock:
+                    cidr: 10.0.0.0/24
+              ports:
+                - protocol: TCP
+                  port: 5978
+    asserts:
+      - equal:
+          path: kind
+          value: NetworkPolicy
+  - it: Should include multiple yaml pieces
+    set:
+      extraDeploy: |
+        ---
+        apiVersion: networking.k8s.io/v1
+        kind: NetworkPolicy
+        ---
+        apiVersion: networking.k8s.io/v1
+        kind: NetworkPolicy
+    asserts:
+      - hasDocuments:
+          count: 2