diff --git a/includes/class-admin-settings.php b/includes/class-admin-settings.php
index 4158eb65..fd9698bd 100644
--- a/includes/class-admin-settings.php
+++ b/includes/class-admin-settings.php
@@ -104,7 +104,7 @@ public function reset_settings() {
 					network_admin_url( 'index.php?page=aspireupdate-settings' )
 				)
 			);
-			exit;
+			! defined( 'AP_RUN_TESTS' ) && exit;
 		}
 	}
 
diff --git a/tests/phpunit/tests/AdminSettings/AdminSettings_ResetSettingsTest.php b/tests/phpunit/tests/AdminSettings/AdminSettings_ResetSettingsTest.php
new file mode 100644
index 00000000..319167ff
--- /dev/null
+++ b/tests/phpunit/tests/AdminSettings/AdminSettings_ResetSettingsTest.php
@@ -0,0 +1,183 @@
+<?php
+/**
+ * Class AdminSettings_ResetSettingsTest
+ *
+ * @package AspireUpdate
+ */
+
+/**
+ * Tests for Admin_Settings::reset_settings()
+ *
+ * @covers \AspireUpdate\Admin_Settings::reset_settings
+ */
+class AdminSettings_ResetSettingsTest extends AdminSettings_UnitTestCase {
+	/**
+	 * Test that settings are not reset when $_GET['reset'] is not set.
+	 */
+	public function test_should_not_reset_settings_when_get_reset_is_not_set() {
+		unset( $_GET['reset'] );
+
+		$settings = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		$this->assertSame( $settings, get_site_option( self::$option_name ) );
+	}
+
+	/**
+	 * Test that a redirect is not performed when $_GET['reset'] is not set.
+	 */
+	public function test_should_not_redirect_when_get_reset_is_not_set() {
+		unset( $_GET['reset'] );
+
+		$settings = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$redirect = new MockAction();
+		add_filter( 'wp_redirect', [ $redirect, 'filter' ] );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		$this->assertSame( 0, $redirect->get_call_count() );
+	}
+
+	/**
+	 * Test that settings are not reset when $_GET['reset'] is set to an incorrect value.
+	 */
+	public function test_should_not_reset_settings_when_get_reset_is_set_to_an_incorrect_value() {
+		$_GET['reset'] = 'incorrect_value';
+		$settings      = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'] );
+
+		$this->assertSame( $settings, get_site_option( self::$option_name ) );
+	}
+
+	/**
+	 * Test that a redirect is not performed when $_GET['reset'] is set to an incorrect value.
+	 */
+	public function test_should_not_redirect_when_get_reset_is_set_to_an_incorrect_value() {
+		$_GET['reset'] = 'incorrect_value';
+		$settings      = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$redirect = new MockAction();
+		add_filter( 'wp_redirect', [ $redirect, 'filter' ] );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'] );
+
+		$this->assertSame( 0, $redirect->get_call_count() );
+	}
+
+	/**
+	 * Test that settings are not reset when $_GET['reset-nonce'] is not set.
+	 */
+	public function test_should_not_reset_settings_when_get_resetnonce_is_not_set() {
+		unset( $_GET['reset-nonce'] );
+
+		$_GET['reset'] = 'reset';
+		$settings      = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'] );
+
+		$this->assertSame( $settings, get_site_option( self::$option_name ) );
+	}
+
+	/**
+	 * Test that settings are not reset when nonce verification fails.
+	 */
+	public function test_should_not_reset_settings_when_nonce_verification_fails() {
+		$_GET['reset']       = 'reset';
+		$_GET['reset-nonce'] = 'an_invalid_value';
+
+		$settings = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'], $_GET['reset-nonce'] );
+
+		$this->assertSame( $settings, get_site_option( self::$option_name ) );
+	}
+
+	/**
+	 * Test that a redirect is not performed when nonce verification fails.
+	 */
+	public function test_should_not_redirect_settings_when_nonce_verification_fails() {
+		$_GET['reset']       = 'reset';
+		$_GET['reset-nonce'] = 'an_invalid_value';
+
+		$settings = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$redirect = new MockAction();
+		add_filter( 'wp_redirect', [ $redirect, 'filter' ] );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'], $_GET['reset-nonce'] );
+
+		$this->assertSame( 0, $redirect->get_call_count() );
+	}
+
+	/**
+	 * Test that settings are reset when reset requirements are met.
+	 *
+	 * @runInSeparateProcess
+	 * @preserveGlobalState disabled
+	 */
+	public function test_should_reset_settings_when_reset_requirements_are_met() {
+		$_GET['reset']       = 'reset';
+		$_GET['reset-nonce'] = wp_create_nonce( 'aspireupdate-reset-nonce' );
+
+		$settings = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'], $_GET['reset-nonce'] );
+
+		$this->assertNotSame( $settings, get_site_option( self::$option_name ) );
+	}
+
+	/**
+	 * Test that a redirect is performed when reset requirements are met.
+	 *
+	 * @runInSeparateProcess
+	 * @preserveGlobalState disabled
+	 */
+	public function test_should_redirect_when_reset_requirements_are_met() {
+		$_GET['reset']       = 'reset';
+		$_GET['reset-nonce'] = wp_create_nonce( 'aspireupdate-reset-nonce' );
+
+		$settings = [ 'api_host' => 'the.option.value' ];
+		update_site_option( self::$option_name, $settings );
+
+		$redirect = new MockAction();
+		add_filter( 'wp_redirect', [ $redirect, 'filter' ] );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$admin_settings->reset_settings();
+
+		unset( $_GET['reset'], $_GET['reset-nonce'] );
+
+		$this->assertSame( 1, $redirect->get_call_count() );
+	}
+}