diff --git a/tests/phpunit/tests/ThemesScreens/ThemesScreens_AdminEnqueueScriptsTest.php b/tests/phpunit/tests/ThemesScreens/ThemesScreens_AdminEnqueueScriptsTest.php
new file mode 100644
index 0000000..eb79dcd
--- /dev/null
+++ b/tests/phpunit/tests/ThemesScreens/ThemesScreens_AdminEnqueueScriptsTest.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Class ThemesScreens_AdminEnqueueScriptsTest
+ *
+ * @package AspireUpdate
+ */
+
+/**
+ * Tests for Themes_Screens::admin_enqueue_scripts()
+ *
+ * @covers \AspireUpdate\Themes_Screens::admin_enqueue_scripts
+ */
+class ThemesScreens_AdminEnqueueScriptsTest extends WP_UnitTestCase {
+	/**
+	 * Dequeue the stylesheet after each test runs.
+	 *
+	 * @return void
+	 */
+	public function tear_down() {
+		wp_dequeue_style( 'aspire_update_themes_screens_css' );
+	}
+
+	/**
+	 * Test that the stylesheet is enqueued on certain screens.
+	 */
+	public function test_should_enqueue_style_on_theme_install() {
+		$themes_screens = new AspireUpdate\Themes_Screens();
+		$themes_screens->admin_enqueue_scripts( 'theme-install.php' );
+		$this->assertTrue( wp_style_is( 'aspire_update_themes_screens_css' ) );
+	}
+
+	/**
+	 * Test that the stylesheet is not enqueued on adjacent screens.
+	 *
+	 * @dataProvider data_adjacent_screens
+	 *
+	 * @param string $hook The current screen's hook.
+	 */
+	public function test_should_not_enqueue_style_on_adjacent_screens( $hook ) {
+		if ( is_multisite() ) {
+			$hook .= '-network';
+		}
+
+		$themes_screens = new AspireUpdate\Themes_Screens();
+		$themes_screens->admin_enqueue_scripts( $hook );
+		$this->assertFalse( wp_style_is( 'aspire_update_themes_screens_css' ) );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_adjacent_screens() {
+		return self::text_array_to_dataprovider(
+			[
+				'themes',
+				'nav-menus',
+				'theme-editor',
+			]
+		);
+	}
+
+	/**
+	 * Test that the stylesheet is not enqueued when there is no screen.
+	 */
+	public function test_should_not_enqueue_style_when_there_is_no_screen() {
+		$themes_screens = new AspireUpdate\Themes_Screens();
+		$themes_screens->admin_enqueue_scripts( '' );
+		$this->assertFalse( wp_style_is( 'aspire_update_themes_screens_css' ) );
+	}
+
+	/**
+	 * Test that the stylesheet is not enqueued when AP_REMOVE_UI is set to true.
+	 *
+	 * @runInSeparateProcess
+	 * @preserveGlobalState disabled
+	 */
+	public function test_should_not_enqueue_style_when_ap_remove_ui_is_true() {
+		// Prevent the notice from being displayed.
+		define( 'AP_REMOVE_UI', true );
+
+		$hook           = is_multisite() ? 'theme-install-network' : 'theme-install';
+		$themes_screens = new AspireUpdate\Themes_Screens();
+		$themes_screens->admin_enqueue_scripts( $hook );
+		$this->assertFalse( wp_style_is( 'aspire_update_themes_screens_css' ) );
+	}
+}