diff --git a/lib/doDuring.js b/lib/doDuring.js
index b198d1720..6e80f549b 100644
--- a/lib/doDuring.js
+++ b/lib/doDuring.js
@@ -21,7 +21,7 @@ import onlyOnce from './internal/onlyOnce';
  * non-error args from the previous callback of `fn`.
  * @param {Function} [callback] - A callback which is called after the test
  * function has failed and repeated execution of `fn` has stopped. `callback`
- * will be passed an error if one occured, otherwise `null`.
+ * will be passed an error if one occurred, otherwise `null`.
  */
 export default function doDuring(fn, test, callback) {
     callback = onlyOnce(callback || noop);
diff --git a/lib/during.js b/lib/during.js
index 549ad445c..376c4458c 100644
--- a/lib/during.js
+++ b/lib/during.js
@@ -20,7 +20,7 @@ import onlyOnce from './internal/onlyOnce';
  * completed with an optional `err` argument. Invoked with (callback).
  * @param {Function} [callback] - A callback which is called after the test
  * function has failed and repeated execution of `fn` has stopped. `callback`
- * will be passed an error, if one occured, otherwise `null`.
+ * will be passed an error, if one occurred, otherwise `null`.
  * @example
  *
  * var count = 0;