diff --git a/test/colors/colors-false.webpack.config.js b/test/colors/colors-false.webpack.config.js
index b0f58638bfa..ca20696f2e3 100644
--- a/test/colors/colors-false.webpack.config.js
+++ b/test/colors/colors-false.webpack.config.js
@@ -2,4 +2,5 @@ module.exports = {
     stats: {
         colors: false,
     },
+    mode: 'production',
 };
diff --git a/test/colors/colors-true.webpack.config.js b/test/colors/colors-true.webpack.config.js
index 15fc57eafd8..76255bff92d 100644
--- a/test/colors/colors-true.webpack.config.js
+++ b/test/colors/colors-true.webpack.config.js
@@ -2,4 +2,5 @@ module.exports = {
     stats: {
         colors: true,
     },
+    mode: 'production',
 };
diff --git a/test/colors/multiple-configs.js b/test/colors/multiple-configs.js
index b175991ac4d..0828c36394a 100644
--- a/test/colors/multiple-configs.js
+++ b/test/colors/multiple-configs.js
@@ -3,10 +3,12 @@ module.exports = [
         name: 'first-config',
         entry: './src/first.js',
         stats: 'normal',
+        mode: 'production',
     },
     {
         name: 'second-config',
         entry: './src/second.js',
         stats: 'normal',
+        mode: 'production',
     },
 ];
diff --git a/test/colors/no-stats.webpack.config.js b/test/colors/no-stats.webpack.config.js
index 34672801b3d..71af9d200a9 100644
--- a/test/colors/no-stats.webpack.config.js
+++ b/test/colors/no-stats.webpack.config.js
@@ -1,3 +1,4 @@
 module.exports = {
     name: 'test',
+    mode: 'production',
 };
diff --git a/test/colors/stats-boolean.webpack.config.js b/test/colors/stats-boolean.webpack.config.js
index 1c9b636be33..9f947b31986 100644
--- a/test/colors/stats-boolean.webpack.config.js
+++ b/test/colors/stats-boolean.webpack.config.js
@@ -1,3 +1,4 @@
 module.exports = {
     stats: true,
+    mode: 'production',
 };
diff --git a/test/colors/stats-string.webpack.config.js b/test/colors/stats-string.webpack.config.js
index 5c13e746a6a..d3712a1cf09 100644
--- a/test/colors/stats-string.webpack.config.js
+++ b/test/colors/stats-string.webpack.config.js
@@ -1,3 +1,4 @@
 module.exports = {
     stats: 'verbose',
+    mode: 'production',
 };
diff --git a/test/colors/webpack.config.js b/test/colors/webpack.config.js
new file mode 100644
index 00000000000..5b69c702150
--- /dev/null
+++ b/test/colors/webpack.config.js
@@ -0,0 +1,3 @@
+module.exports = {
+    mode: 'production',
+};
diff --git a/test/watch/watch-flag.test.js b/test/watch/watch-flag.test.js
index e326fed48d8..fc6d3c153a8 100644
--- a/test/watch/watch-flag.test.js
+++ b/test/watch/watch-flag.test.js
@@ -10,7 +10,7 @@ const wordsInStatsv5 = ['asset', 'index.js', 'compiled successfully'];
 
 describe('--watch flag', () => {
     it('should recompile upon file change', (done) => {
-        const proc = runAndGetWatchProc(__dirname, ['--watch'], false, '', true);
+        const proc = runAndGetWatchProc(__dirname, ['--watch', '--mode', 'production'], false, '', true);
         let semaphore = 0;
         proc.stdout.on('data', (chunk) => {
             const data = stripAnsi(chunk.toString());
@@ -45,7 +45,7 @@ describe('--watch flag', () => {
     });
 
     it('should print compilation lifecycle', (done) => {
-        const proc = runAndGetWatchProc(__dirname, ['--watch'], false, '', true);
+        const proc = runAndGetWatchProc(__dirname, ['--watch', '--mode', 'production'], false, '', true);
         let semaphore = 0;
         proc.stdout.on('data', (chunk) => {
             const data = stripAnsi(chunk.toString());