diff --git a/.github/workflows/yarn.yml b/.github/workflows/yarn.yml
index ad5e23797d..82ca1d629a 100644
--- a/.github/workflows/yarn.yml
+++ b/.github/workflows/yarn.yml
@@ -27,3 +27,5 @@ jobs:
         run: yarn test-sdk
       - working-directory: ./test
         run: yarn test-primitives
+      - working-directory: ./test
+        run: yarn test-mock
diff --git a/test/package.json b/test/package.json
index fc9fa7243e..fc36a4e4b4 100644
--- a/test/package.json
+++ b/test/package.json
@@ -22,6 +22,7 @@
     "start-dyn-val-release": "cargo build --release && NODE_ENV=production mocha -r ts-node/register --timeout 10000 src/e2e.dynval/*.test.ts",
     "test-sdk": "mocha -r ts-node/register --timeout 5000 \"src/sdk/**/*.spec.ts\"",
     "test-primitives": "mocha -r ts-node/register --timeout 5000 \"src/primitives/**/*.test.ts\"",
+    "test-mock": "mocha -r ts-node/register --timeout 5000 \"src/helper/mock/**/*.test.ts\"",
     "tendermint-test-local": "cargo build --release && NODE_ENV=production ts-node src/tendermint.test/local.ts",
     "tendermint-test-remote": "NODE_ENV=production ts-node src/tendermint.test/remote.ts",
     "lint": "tslint -p . && prettier 'src/**/*.{ts, json}' -l",
diff --git a/test/src/helper/mock/test/blockSyncMessage.test.ts b/test/src/helper/mock/test/blockSyncMessage.test.ts
index 252f441394..2f80a180b4 100644
--- a/test/src/helper/mock/test/blockSyncMessage.test.ts
+++ b/test/src/helper/mock/test/blockSyncMessage.test.ts
@@ -14,7 +14,7 @@ describe("Check BlockSyncMessage RLP encoding", function() {
             id: new U256(10),
             message
         });
-        expect([...msg.rlpBytes()]).deep.equal([195, 4, 10, 192]);
+        expect(msg.rlpBytes().toString("hex")).deep.equal("c3040ac0");
     });
 
     it("ResponseBodyMessage RLP encoding test", function() {
@@ -27,6 +27,6 @@ describe("Check BlockSyncMessage RLP encoding", function() {
             id: new U256(10),
             message
         });
-        expect([...msg.rlpBytes()]).deep.equal([196, 5, 10, 193, 192]);
+        expect(msg.rlpBytes().toString("hex")).deep.equal("c8050ac5840204c1c0");
     });
 });
diff --git a/test/src/helper/mock/test/txSyncMessage.test.ts b/test/src/helper/mock/test/txSyncMessage.test.ts
index 2b281be507..c90929b2d2 100644
--- a/test/src/helper/mock/test/txSyncMessage.test.ts
+++ b/test/src/helper/mock/test/txSyncMessage.test.ts
@@ -8,6 +8,6 @@ describe("Check TransactionSyncMessage RLP encoding", function() {
             type: "transactions",
             data: []
         });
-        expect([...msg.rlpBytes()]).deep.equal([192]);
+        expect(msg.rlpBytes().toString("hex")).deep.equal("830100c0");
     });
 });