diff --git a/tests/phpunit/tests/AdminSettings/AdminSettings_AdminNoticesTest.php b/tests/phpunit/tests/AdminSettings/AdminSettings_AdminNoticesTest.php
new file mode 100644
index 0000000..d6bfae0
--- /dev/null
+++ b/tests/phpunit/tests/AdminSettings/AdminSettings_AdminNoticesTest.php
@@ -0,0 +1,176 @@
+<?php
+/**
+ * Class AdminSettings_AdminNoticesTest
+ *
+ * @package AspireUpdate
+ */
+
+/**
+ * Tests for Admin_Settings::admin_notices()
+ *
+ * @covers \AspireUpdate\Admin_Settings::admin_notices
+ */
+class AdminSettings_AdminNoticesTest extends AdminSettings_UnitTestCase {
+	/**
+	 * Test that the reset notice is not output when the 'aspireupdate-reset' option is not set to (string) "true".
+	 */
+	public function test_should_not_output_reset_notice_when_aspireupdatereset_option_is_not_set_to_true() {
+		update_site_option( 'aspireupdate-reset', 'false' );
+		$_GET['reset-success']       = 'success';
+		$_GET['reset-success-nonce'] = wp_create_nonce( 'aspireupdate-reset-success-nonce' );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		delete_site_option( 'aspireupdate-reset' );
+		unset( $_GET['reset-success'], $_GET['reset-success-nonce'] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_reset', $actual );
+	}
+
+	/**
+	 * Test that the reset notice is not output when $_GET['reset-success'] is not set.
+	 */
+	public function test_should_not_output_reset_notice_when_get_resetsuccess_is_not_set() {
+		update_site_option( 'aspireupdate-reset', 'true' );
+		unset( $_GET['reset-success'] );
+		$_GET['reset-success-nonce'] = wp_create_nonce( 'aspireupdate-reset-success-nonce' );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		delete_site_option( 'aspireupdate-reset' );
+		unset( $_GET['reset-success-nonce'] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_reset', $actual );
+	}
+
+	/**
+	 * Test that the reset notice is not output when $_GET['reset'] is set to an incorrect value.
+	 */
+	public function test_should_not_output_reset_notice_when_get_resetsuccess_is_set_to_an_incorrect_value() {
+		update_site_option( 'aspireupdate-reset', 'true' );
+		$_GET['reset-success']       = 'incorrect_value';
+		$_GET['reset-success-nonce'] = wp_create_nonce( 'aspireupdate-reset-success-nonce' );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		delete_site_option( 'aspireupdate-reset' );
+		unset( $_GET['reset-success'], $_GET['reset-success-nonce'] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_reset', $actual );
+	}
+
+	/**
+	 * Test that the reset notice is not output when $_GET['reset-success-nonce'] is not set.
+	 */
+	public function test_should_not_output_reset_notice_when_get_resetsuccessnonce_is_not_set() {
+		update_site_option( 'aspireupdate-reset', 'true' );
+		$_GET['reset-success'] = 'success';
+		unset( $_GET['reset-success-nonce'] );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		delete_site_option( 'aspireupdate-reset' );
+		unset( $_GET['reset-success'] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_reset', $actual );
+	}
+
+	/**
+	 * Test that the reset notice is not output when nonce verification fails.
+	 */
+	public function test_should_not_output_reset_notice_when_nonce_verification_fails() {
+		update_site_option( 'aspireupdate-reset', 'true' );
+		$_GET['reset-success']       = 'success';
+		$_GET['reset-success-nonce'] = 'an_invalid_value';
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		delete_site_option( 'aspireupdate-reset' );
+		unset( $_GET['reset-success'], $_GET['reset-success-nonce'] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_reset', $actual );
+	}
+
+	/**
+	 * Test that the reset notice is output.
+	 */
+	public function test_should_output_reset_notice() {
+		update_site_option( 'aspireupdate-reset', 'true' );
+		$_GET['reset-success']       = 'success';
+		$_GET['reset-success-nonce'] = wp_create_nonce( 'aspireupdate-reset-success-nonce' );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		unset( $_GET['reset-success'], $_GET['reset-success-nonce'] );
+
+		$this->assertStringContainsString(
+			'aspireupdate_settings_reset',
+			$actual
+		);
+	}
+
+	/**
+	 * Test that the 'aspireupdate-reset' option is deleted.
+	 */
+	public function test_should_delete_aspireupdatereset_option_after_output() {
+		update_site_option( 'aspireupdate-reset', 'true' );
+		$_GET['reset-success']       = 'success';
+		$_GET['reset-success-nonce'] = wp_create_nonce( 'aspireupdate-reset-success-nonce' );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		unset( $_GET['reset-success'], $_GET['reset-success-nonce'] );
+
+		$this->assertFalse( get_site_option( 'aspireupdate-reset', false ) );
+	}
+
+	/**
+	 * Test that the saved notice is not output when $_GET['reset-success-nonce'] is not set.
+	 */
+	public function test_should_not_output_saved_notice_when_get_resetsuccessnonce_is_not_set() {
+		unset( $_GET['settings-updated-wpnonce'] );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_saved', $actual );
+	}
+
+	/**
+	 * Test that the saved notice is not output when nonce verification fails.
+	 */
+	public function test_should_not_output_saved_notice_when_nonce_verification_fails() {
+		$_GET['settings-updated-wpnonce'] = 'an_invalid_value';
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		unset( $_GET['settings-updated-wpnonce'] );
+
+		$this->assertStringNotContainsString( 'aspireupdate_settings_saved', $actual );
+	}
+
+	/**
+	 * Test that the saved notice is output.
+	 */
+	public function test_should_output_saved_notice() {
+		$_GET['settings-updated-wpnonce'] = wp_create_nonce( 'aspireupdate-settings-updated-nonce' );
+
+		$admin_settings = new \AspireUpdate\Admin_Settings();
+		$actual         = get_echo( [ $admin_settings, 'admin_notices' ] );
+
+		unset( $_GET['settings-updated-wpnonce'] );
+
+		$this->assertStringContainsString(
+			'aspireupdate_settings_saved',
+			$actual
+		);
+	}
+}