diff --git a/packages/grpc-js-xds/interop/Dockerfile b/packages/grpc-js-xds/interop/Dockerfile
new file mode 100644
index 000000000..e8a0a98cb
--- /dev/null
+++ b/packages/grpc-js-xds/interop/Dockerfile
@@ -0,0 +1,38 @@
+# Copyright 2022 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Dockerfile for building the xDS interop client. To build the image, run the
+# following command from grpc-node directory:
+# docker build -t <TAG> -f packages/grpc-js-xds/interop/Dockerfile .
+
+FROM node:16-alpine as build
+
+# Make a grpc-node directory and copy the repo into it.
+WORKDIR /node/src/grpc-node
+COPY . .
+
+WORKDIR /node/src/grpc-node/packages/grpc-js
+RUN npm install
+WORKDIR /node/src/grpc-node/packages/grpc-js-xds
+RUN npm install
+
+FROM node:16-alpine
+WORKDIR /node/src/grpc-node
+COPY --from=build /node/src/grpc-node/packages/grpc-js ./packages/grpc-js/
+COPY --from=build /node/src/grpc-node/packages/grpc-js-xds ./packages/grpc-js-xds/
+
+ENV GRPC_VERBOSITY="DEBUG"
+ENV GRPC_TRACE=xds_client,xds_resolver,cds_balancer,eds_balancer,priority,weighted_target,round_robin,resolving_load_balancer,subchannel,keepalive,dns_resolver,fault_injection,http_filter,csds
+
+ENTRYPOINT [ "node", "/node/src/grpc-node/packages/grpc-js-xds/build/interop/xds-interop-client" ]
diff --git a/packages/grpc-js-xds/scripts/xds_k8s_url_map.sh b/packages/grpc-js-xds/scripts/xds_k8s_url_map.sh
index 4371f235c..c29d0c0a5 100644
--- a/packages/grpc-js-xds/scripts/xds_k8s_url_map.sh
+++ b/packages/grpc-js-xds/scripts/xds_k8s_url_map.sh
@@ -133,6 +133,10 @@ main() {
   local script_dir
   script_dir="$(dirname "$0")"
 
+  cd "${script_dir}"
+
+  git submodule update --init --recursive
+
   # Source the test driver from the master branch.
   echo "Sourcing test driver install script from: ${TEST_DRIVER_INSTALL_SCRIPT_URL}"
   source /dev/stdin <<< "$(curl -s "${TEST_DRIVER_INSTALL_SCRIPT_URL}")"
diff --git a/packages/grpc-js/package.json b/packages/grpc-js/package.json
index 723b108ff..3ceaefebe 100644
--- a/packages/grpc-js/package.json
+++ b/packages/grpc-js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@grpc/grpc-js",
-  "version": "1.6.7",
+  "version": "1.6.8",
   "description": "gRPC Library for Node - pure JS implementation",
   "homepage": "https://grpc.io/",
   "repository": "https://github.com/grpc/grpc-node/tree/master/packages/grpc-js",
@@ -58,7 +58,7 @@
     "generate-test-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --include-dirs test/fixtures/ -O test/generated/ --grpcLib ../../src/index test_service.proto"
   },
   "dependencies": {
-    "@grpc/proto-loader": "^0.6.4",
+    "@grpc/proto-loader": "^0.7.0",
     "@types/node": ">=12.12.47"
   },
   "files": [
diff --git a/packages/grpc-js/src/load-balancer-outlier-detection.ts b/packages/grpc-js/src/load-balancer-outlier-detection.ts
index 2c231c406..dde618b73 100644
--- a/packages/grpc-js/src/load-balancer-outlier-detection.ts
+++ b/packages/grpc-js/src/load-balancer-outlier-detection.ts
@@ -430,11 +430,12 @@ export class OutlierDetectionLoadBalancer implements LoadBalancer {
 
     // Step 2
     const successRateMean = successRates.reduce((a, b) => a + b) / successRates.length;
-    let successRateVariance = 0;
+    let successRateDeviationSum = 0;
     for (const rate of successRates) {
       const deviation = rate - successRateMean;
-      successRateVariance += deviation * deviation;
+      successRateDeviationSum += deviation * deviation;
     }
+    const successRateVariance = successRateDeviationSum / successRates.length;
     const successRateStdev = Math.sqrt(successRateVariance);
     const ejectionThreshold = successRateMean - successRateStdev * (successRateConfig.stdev_factor / 1000);