diff --git a/templates/typescript_gapic/webpack.config.js.njk b/templates/typescript_gapic/webpack.config.js.njk
index c74a2c6d8..e5d6ca65a 100644
--- a/templates/typescript_gapic/webpack.config.js.njk
+++ b/templates/typescript_gapic/webpack.config.js.njk
@@ -39,23 +39,23 @@ module.exports = {
         exclude: /node_modules/
       },
       {
-        test: /node_modules[\\\/]@grpc[\\\/]grpc-js/,
+        test: /node_modules[\\/]@grpc[\\/]grpc-js/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]grpc/,
+        test: /node_modules[\\/]grpc/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]retry-request/,
+        test: /node_modules[\\/]retry-request/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]https-proxy-agent/,
+        test: /node_modules[\\/]https-proxy-agent/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]gtoken/,
+        test: /node_modules[\\/]gtoken/,
         use: 'null-loader'
       },
     ],
diff --git a/typescript/test/testdata/keymanager/webpack.config.js.baseline b/typescript/test/testdata/keymanager/webpack.config.js.baseline
index 1fe16b5c8..bc1b62a5e 100644
--- a/typescript/test/testdata/keymanager/webpack.config.js.baseline
+++ b/typescript/test/testdata/keymanager/webpack.config.js.baseline
@@ -39,23 +39,23 @@ module.exports = {
         exclude: /node_modules/
       },
       {
-        test: /node_modules[\\\/]@grpc[\\\/]grpc-js/,
+        test: /node_modules[\\/]@grpc[\\/]grpc-js/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]grpc/,
+        test: /node_modules[\\/]grpc/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]retry-request/,
+        test: /node_modules[\\/]retry-request/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]https-proxy-agent/,
+        test: /node_modules[\\/]https-proxy-agent/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]gtoken/,
+        test: /node_modules[\\/]gtoken/,
         use: 'null-loader'
       },
     ],
diff --git a/typescript/test/testdata/showcase/webpack.config.js.baseline b/typescript/test/testdata/showcase/webpack.config.js.baseline
index 7a3e258a4..826b5a7d8 100644
--- a/typescript/test/testdata/showcase/webpack.config.js.baseline
+++ b/typescript/test/testdata/showcase/webpack.config.js.baseline
@@ -39,23 +39,23 @@ module.exports = {
         exclude: /node_modules/
       },
       {
-        test: /node_modules[\\\/]@grpc[\\\/]grpc-js/,
+        test: /node_modules[\\/]@grpc[\\/]grpc-js/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]grpc/,
+        test: /node_modules[\\/]grpc/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]retry-request/,
+        test: /node_modules[\\/]retry-request/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]https-proxy-agent/,
+        test: /node_modules[\\/]https-proxy-agent/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]gtoken/,
+        test: /node_modules[\\/]gtoken/,
         use: 'null-loader'
       },
     ],
diff --git a/typescript/test/testdata/texttospeech/webpack.config.js.baseline b/typescript/test/testdata/texttospeech/webpack.config.js.baseline
index 05026a2d9..5b923b63b 100644
--- a/typescript/test/testdata/texttospeech/webpack.config.js.baseline
+++ b/typescript/test/testdata/texttospeech/webpack.config.js.baseline
@@ -39,23 +39,23 @@ module.exports = {
         exclude: /node_modules/
       },
       {
-        test: /node_modules[\\\/]@grpc[\\\/]grpc-js/,
+        test: /node_modules[\\/]@grpc[\\/]grpc-js/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]grpc/,
+        test: /node_modules[\\/]grpc/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]retry-request/,
+        test: /node_modules[\\/]retry-request/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]https-proxy-agent/,
+        test: /node_modules[\\/]https-proxy-agent/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]gtoken/,
+        test: /node_modules[\\/]gtoken/,
         use: 'null-loader'
       },
     ],
diff --git a/typescript/test/testdata/translate/webpack.config.js.baseline b/typescript/test/testdata/translate/webpack.config.js.baseline
index e9d7243bc..d3e63b586 100644
--- a/typescript/test/testdata/translate/webpack.config.js.baseline
+++ b/typescript/test/testdata/translate/webpack.config.js.baseline
@@ -39,23 +39,23 @@ module.exports = {
         exclude: /node_modules/
       },
       {
-        test: /node_modules[\\\/]@grpc[\\\/]grpc-js/,
+        test: /node_modules[\\/]@grpc[\\/]grpc-js/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]grpc/,
+        test: /node_modules[\\/]grpc/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]retry-request/,
+        test: /node_modules[\\/]retry-request/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]https-proxy-agent/,
+        test: /node_modules[\\/]https-proxy-agent/,
         use: 'null-loader'
       },
       {
-        test: /node_modules[\\\/]gtoken/,
+        test: /node_modules[\\/]gtoken/,
         use: 'null-loader'
       },
     ],