diff --git a/CHANGELOG.md b/CHANGELOG.md
index b88953d..0a5ac21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Change `orchestra/testbench` version to match Laravel version.
+### Added
+- Added a `IdentityManager::flushIdentities()` method to clear the identity map.
 
 ## [1.0.0] - 2020-06-24
 - Initial release
diff --git a/README.md b/README.md
index 0d4e76c..183c03a 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ using the Identity Map design pattern ([P of EAA](https://martinfowler.com/eaaCa
     - [Finding](#finding)
     - [Hydrating](#hydrating)
     - [Belongs To](#belongsto)
+    - [Flushing](#flushing)
 - [How does it work](#how)
 - [Why?](#why)
 
@@ -68,6 +69,10 @@ updated, but will retain any changes you'd previously made.
 If a belongs to relationship is loaded (not belongs to many) without constraints and without `refreshIdentityMap()` being 
 called, the query will skip any model instances that already exist.
 
+### Flushing
+If you wish to flush the cached models, call `flushIdentities()` on an instance of `IdentityManager`, or on the `Eloquence`
+facade.
+
 ## How
 The `IdentityManager` stores an array containing all existing model instances and their identity.
 
diff --git a/composer.json b/composer.json
index 2d433e9..04ff52a 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
     "laravel/framework": "^7.0"
   },
   "require-dev": {
-    "orchestra/testbench": "^4.0"
+    "orchestra/testbench": "^5.0"
   },
   "extra": {
     "laravel": {
diff --git a/src/IdentityManager.php b/src/IdentityManager.php
index a762afe..81c0ea9 100644
--- a/src/IdentityManager.php
+++ b/src/IdentityManager.php
@@ -94,6 +94,18 @@ public function removeIdentity(ModelIdentity $identity): IdentityManager
         return $this;
     }
 
+    /**
+     * Remove all models from the identity map.
+     *
+     * @return $this
+     */
+    public function flushIdentities(): IdentityManager
+    {
+        $this->models = [];
+
+        return $this;
+    }
+
     /**
      * Get all stored identities.
      *