diff --git a/.circleci/config.yml b/.circleci/config.yml
index af2ade399dd2..64acce4922a2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -69,6 +69,7 @@ jobs:
       - run:
           name: "Build"
           command: cond_spot_run_build aztec3-circuits-wasm-linux-clang 64
+  
   yarn-project-base:
     machine:
       image: ubuntu-2004:202010-01
@@ -91,6 +92,17 @@ jobs:
           name: "Build and test"
           command: build ethereum.js
 
+  circuits-js:
+    machine:
+      image: ubuntu-2004:202010-01
+    resource_class: large
+    steps:
+      - *checkout
+      - *setup_env
+      - run:
+          name: "Build and test"
+          command: build circuits.js
+
   foundation:
     machine:
       image: ubuntu-2004:202010-01
@@ -231,6 +243,7 @@ workflows:
       - aztec-js: *yarn_project
       - end-to-end: *yarn_project
       - foundation: *yarn_project
+      - circuits-js: *yarn_project
       - e2e-join:
           requires:
             - ethereum-js
@@ -238,6 +251,7 @@ workflows:
             - end-to-end
             - noir-contracts
             - foundation
+            - circuits-js
           <<: *defaults
       - e2e-deploy-contract: *e2e_test
       - world-state: *yarn_project
diff --git a/build_manifest.json b/build_manifest.json
index a477bbef626d..d22ac9133e5b 100644
--- a/build_manifest.json
+++ b/build_manifest.json
@@ -73,6 +73,13 @@
     "rebuildPatterns": ["^yarn-project/aztec.js/"],
     "dependencies": ["aztec-rpc"]
   },
+  "circuits.js": {
+    "buildDir": "yarn-project",
+    "projectDir": "yarn-project/circuits.js",
+    "dockerfile": "circuits.js/Dockerfile",
+    "rebuildPatterns": ["^yarn-project/circuits.js/"],
+    "dependencies": ["aztec-rpc"]
+  },
   "barretenberg.js": {
     "buildDir": "yarn-project",
     "projectDir": "yarn-project/barretenberg.js",
diff --git a/yarn-project/circuits.js/Dockerfile b/yarn-project/circuits.js/Dockerfile
new file mode 100644
index 000000000000..1f7c5b4c5d34
--- /dev/null
+++ b/yarn-project/circuits.js/Dockerfile
@@ -0,0 +1,20 @@
+FROM 278380418400.dkr.ecr.eu-west-2.amazonaws.com/yarn-project-base AS builder
+
+COPY foundation foundation
+COPY circuits.js circuits.js
+
+WORKDIR /usr/src/yarn-project/foundation
+RUN yarn build
+
+WORKDIR /usr/src/yarn-project/circuits.js
+RUN cp /usr/src/aztec3-circuits/cpp/build-wasm/bin/aztec3-circuits.wasm src/wasm/aztec3-circuits.wasm
+RUN yarn build && yarn formatting && yarn test
+
+# Prune dev dependencies. See comment in base image.
+RUN yarn cache clean
+RUN yarn workspaces focus --production > /dev/null
+
+FROM alpine:latest
+COPY --from=builder /usr/src/yarn-project/circuits.js /usr/src/yarn-project/circuits.js
+WORKDIR /usr/src/yarn-project/merkle-tree
+ENTRYPOINT ["yarn", "test"]
\ No newline at end of file
diff --git a/yarn-project/circuits.js/package.json b/yarn-project/circuits.js/package.json
index 806b14990498..a2f1a6216b1d 100644
--- a/yarn-project/circuits.js/package.json
+++ b/yarn-project/circuits.js/package.json
@@ -18,7 +18,7 @@
     "clean": "rm -rf ./dest .tsbuildinfo",
     "formatting": "prettier --check ./src && eslint --max-warnings 278 ./src",
     "formatting:fix": "prettier -w ./src",
-    "test": "NODE_NO_WARNINGS=1 node --experimental-vm-modules $(yarn bin jest) --no-cache --passWithNoTests",
+    "test": "NODE_NO_WARNINGS=1 node --experimental-vm-modules $(yarn bin jest) --no-cache --passWithNoTests --maxWorkers=2",
     "test-debug": "NODE_NO_WARNINGS=1 node --inspect-brk --experimental-vm-modules $(yarn bin jest) --no-cache --passWithNoTests --runInBand"
   },
   "jest": {
diff --git a/yarn-project/circuits.js/src/structs/merge_rollup.ts b/yarn-project/circuits.js/src/structs/merge_rollup.ts
index 405e7b5cca33..fd562badb894 100644
--- a/yarn-project/circuits.js/src/structs/merge_rollup.ts
+++ b/yarn-project/circuits.js/src/structs/merge_rollup.ts
@@ -16,8 +16,7 @@ export class PreviousRollupData {
      */
     public vkIndex: UInt32,
     public vkSiblingPath: MembershipWitness<typeof ROLLUP_VK_TREE_HEIGHT>,
-  ) {
-  }
+  ) {}
 
   toBuffer() {
     return serializeToBuffer(this.publicInputs, this.proof, this.vk, this.vkIndex, this.vkSiblingPath);
diff --git a/yarn-project/circuits.js/src/tests/factories.ts b/yarn-project/circuits.js/src/tests/factories.ts
index 7ca3e5698d34..f00c6c580afc 100644
--- a/yarn-project/circuits.js/src/tests/factories.ts
+++ b/yarn-project/circuits.js/src/tests/factories.ts
@@ -1,5 +1,11 @@
 import { AztecAddress, EthAddress, Fq, Fr } from '@aztec/foundation';
-import { CallContext, PreviousRollupData, PrivateCircuitPublicInputs, RootRollupInputs, RootRollupPublicInputs } from '../index.js';
+import {
+  CallContext,
+  PreviousRollupData,
+  PrivateCircuitPublicInputs,
+  RootRollupInputs,
+  RootRollupPublicInputs,
+} from '../index.js';
 import { AppendOnlyTreeSnapshot, BaseRollupPublicInputs, ConstantBaseRollupData } from '../structs/base_rollup.js';
 import {
   ARGS_LENGTH,
@@ -22,7 +28,7 @@ import {
   PUBLIC_CALL_STACK_LENGTH,
   RETURN_VALUES_LENGTH,
   ROLLUP_VK_TREE_HEIGHT,
-  VK_TREE_HEIGHT
+  VK_TREE_HEIGHT,
 } from '../structs/constants.js';
 import { FunctionData } from '../structs/function_data.js';
 import {
@@ -34,7 +40,7 @@ import {
   PreviousKernelData,
   PrivateCallData,
   PrivateKernelInputs,
-  PrivateKernelPublicInputs
+  PrivateKernelPublicInputs,
 } from '../structs/kernel.js';
 import { PrivateCallStackItem } from '../structs/private_call_stack_item.js';
 import {
@@ -43,7 +49,7 @@ import {
   ComposerType,
   EcdsaSignature,
   MembershipWitness,
-  UInt8Vector
+  UInt8Vector,
 } from '../structs/shared.js';
 import { ContractDeploymentData, SignedTxRequest, TxContext, TxRequest } from '../structs/tx.js';
 import { CommitmentMap, G1AffineElement, VerificationKey } from '../structs/verification_key.js';
@@ -260,7 +266,7 @@ export function makePreviousBaseRollupData(seed = 0) {
     makeVerificationKey(),
     seed + 0x110,
     makeMembershipWitness(ROLLUP_VK_TREE_HEIGHT, seed + 0x120),
-  )
+  );
 }
 
 export function makeRootRollupInputs(seed = 0) {
diff --git a/yarn-project/circuits.js/src/utils/serialize.ts b/yarn-project/circuits.js/src/utils/serialize.ts
index 834f8c643955..527a45cfbaa0 100644
--- a/yarn-project/circuits.js/src/utils/serialize.ts
+++ b/yarn-project/circuits.js/src/utils/serialize.ts
@@ -119,7 +119,7 @@ export type Bufferable =
     }
   | Bufferable[];
 
-function isSerializableToBuffer32(obj: Object): obj is { toBuffer32: () => Buffer } {
+function isSerializableToBuffer32(obj: object): obj is { toBuffer32: () => Buffer } {
   return !!(obj as { toBuffer32: () => Buffer }).toBuffer32;
 }