diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4597b8440c..b16f79659d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ Changes:
 
 - Added `childstate_getKeysPaged` RPC
 - Align static metadata with latest Substrate
+- Adjust error message for contracts V3 (extrinsic from runtime)
 
 
 ## 4.14.1 Jun 14, 2021
diff --git a/packages/api-contract/src/base/Base.ts b/packages/api-contract/src/base/Base.ts
index 4ffdaf3be7..a98d51de25 100644
--- a/packages/api-contract/src/base/Base.ts
+++ b/packages/api-contract/src/base/Base.ts
@@ -26,6 +26,6 @@ export abstract class Base<ApiType extends ApiTypes> {
     this.registry = this.abi.registry;
     this._decorateMethod = decorateMethod;
 
-    assert(isFunction(api.rx.tx.contracts?.instantiateWithCode), 'You need to connect to a node with a V3 contracts module. Your node does not expose api.tx.contracts.instantiateWithCode on this instance');
+    assert(isFunction(api.tx.contracts?.instantiateWithCode), 'You need to connect to a chain with a runtime with a V3 contracts module. The runtime does not expose api.tx.contracts.instantiateWithCode');
   }
 }
diff --git a/packages/api-contract/src/base/mock.ts b/packages/api-contract/src/base/mock.ts
index 79e7ffc534..63fe59007b 100644
--- a/packages/api-contract/src/base/mock.ts
+++ b/packages/api-contract/src/base/mock.ts
@@ -8,12 +8,10 @@ const registry = new TypeRegistry();
 
 export const mockApi = {
   registry,
-  rx: {
-    tx: {
-      contracts: {
-        instantiateWithCode: (): never => {
-          throw new Error('mock');
-        }
+  tx: {
+    contracts: {
+      instantiateWithCode: (): never => {
+        throw new Error('mock');
       }
     }
   }