diff --git a/gulpfile.config.js b/gulpfile.config.js
index 2e2b67cd..7487fe80 100644
--- a/gulpfile.config.js
+++ b/gulpfile.config.js
@@ -58,6 +58,11 @@ module.exports = {
             'babybuddy.scss'
         ]
     },
+    testsConfig: {
+      isolated: [
+          'babybuddy.tests.tests_formats.FormatsTestCase.test_use_24_hour_time_format_en'
+      ],
+    },
     watchConfig: {
         scriptsGlob: [
             '*/static_src/js/**/*.js',
diff --git a/gulpfile.js b/gulpfile.js
index c0677a80..f98e43c1 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -2,6 +2,7 @@ var gulp = require('gulp');
 
 var concat = require('gulp-concat');
 var del = require('del');
+var es = require('child_process').execSync;
 var flatten = require('gulp-flatten');
 var pump = require('pump');
 var sass = require('gulp-sass');
@@ -47,7 +48,16 @@ function coverage(cb) {
         {
             stdio: 'inherit'
         }
-    ).on('exit', cb);
+    ).on('exit', function() {
+        // Add coverage for isolated tests.
+        config.testsConfig.isolated.forEach(function(test_name) {
+            es(
+                'pipenv run coverage run -a manage.py test ' + test_name,
+                {stdio: 'inherit'}
+            );
+        })
+        cb();
+    });
 }
 
 /**
@@ -176,7 +186,16 @@ function test(cb) {
         'isolate'
     ];
     command = command.concat(process.argv.splice(3));
-    spawn('pipenv', command, { stdio: 'inherit' }).on('exit', cb);
+    spawn('pipenv', command, { stdio: 'inherit' }).on('exit', function() {
+        // Run isolated tests.
+        config.testsConfig.isolated.forEach(function(test_name) {
+            es(
+                'pipenv run python manage.py test ' + test_name,
+                {stdio: 'inherit'}
+            );
+        })
+        cb();
+    });
 }
 
 /**