diff --git a/lib/cli/run-helpers.js b/lib/cli/run-helpers.js
index ec65829f14..f838ba0e86 100644
--- a/lib/cli/run-helpers.js
+++ b/lib/cli/run-helpers.js
@@ -284,8 +284,8 @@ exports.validateLegacyPlugin = (opts, pluginType, map = {}) => {
       // Try to load reporters from a cwd-relative path
       try {
         map[pluginId] = require(path.resolve(pluginId));
-      } catch (e) {
-        throw createUnknownError(e);
+      } catch (err) {
+        throw createUnknownError(err);
       }
     }
   }
diff --git a/lib/cli/watch-run.js b/lib/cli/watch-run.js
index 6d5c6c26a7..644f79d3be 100644
--- a/lib/cli/watch-run.js
+++ b/lib/cli/watch-run.js
@@ -270,8 +270,8 @@ const createRerunner = (mocha, watcher, {beforeRun} = {}) => {
           console.error(`${logSymbols.info} [mocha] waiting for changes...`);
         }
       });
-    } catch (e) {
-      console.error(e.stack);
+    } catch (err) {
+      console.error(err.stack);
     }
   };
 
diff --git a/lib/mocha.js b/lib/mocha.js
index c6ee248561..7e7c7d33f1 100644
--- a/lib/mocha.js
+++ b/lib/mocha.js
@@ -344,8 +344,8 @@ Mocha.prototype.reporter = function (reporterName, reporterOptions) {
         // Try to load reporters from a cwd-relative path
         try {
           reporter = require(path.resolve(reporterName));
-        } catch (e) {
-          throw createInvalidReporterError(e.message, reporterName);
+        } catch (err) {
+          throw createInvalidReporterError(err.message, reporterName);
         }
       }
     }