diff --git a/tests/phpunit/tests/admin/includes/misc/gotUrlRewrite.php b/tests/phpunit/tests/admin/includes/misc/gotUrlRewrite.php
new file mode 100644
index 0000000000000..9e1bdf164a62d
--- /dev/null
+++ b/tests/phpunit/tests/admin/includes/misc/gotUrlRewrite.php
@@ -0,0 +1,138 @@
+<?php
+
+/**
+ * Tests for the got_url_rewrite() function.
+ *
+ * @group admin
+ * @group rewrite
+ *
+ * @covers ::got_url_rewrite
+ */
+class Tests_got_url_rewrite extends WP_UnitTestCase {
+
+	/**
+	 * Saved value of the $is_nginx global.
+	 */
+	private bool $prev_nginx;
+
+	/**
+	 * Saved value of the $is_caddy global.
+	 */
+	private bool $prev_caddy;
+
+	public function set_up() {
+		parent::set_up();
+		global $is_nginx, $is_caddy;
+		$this->prev_nginx = $is_nginx;
+		$this->prev_caddy = $is_caddy;
+	}
+
+	public function tear_down() {
+		global $is_nginx, $is_caddy;
+		$is_nginx = $this->prev_nginx;
+		$is_caddy = $this->prev_caddy;
+		parent::tear_down();
+	}
+
+	/**
+	 * Tests that got_url_rewrite() correctly detects URL rewrite support based on server and filters.
+	 *
+	 * @ticket 65135
+	 *
+	 * @dataProvider data_got_url_rewrite
+	 *
+	 * @param bool $expected     The expected result from got_url_rewrite().
+	 * @param bool $mod_rewrite  Whether mod_rewrite is reported as supported.
+	 * @param bool $is_nginx_val Value for the $is_nginx global.
+	 * @param bool $is_caddy_val Value for the $is_caddy global.
+	 * @param bool $iis7_perm    Whether IIS7 supports permalinks (simulated).
+	 * @param bool|null $filter_val Optional value for the 'got_url_rewrite' filter.
+	 */
+	public function test_got_url_rewrite( $expected, $mod_rewrite, $is_nginx_val, $is_caddy_val, $iis7_perm, $filter_val = null ) {
+		global $is_nginx, $is_caddy;
+
+		$is_nginx = $is_nginx_val;
+		$is_caddy = $is_caddy_val;
+
+		// Mock got_mod_rewrite and iis7_supports_permalinks via filters if possible.
+		// However, got_url_rewrite calls got_mod_rewrite() which calls apache_mod_loaded.
+		// We can use the 'got_rewrite' filter to control got_mod_rewrite()'s output.
+		add_filter( 'got_rewrite', $mod_rewrite ? '__return_true' : '__return_false' );
+
+		// iis7_supports_permalinks() uses iis7_rewrite_rule_exists() which checks files.
+		// For simplicity, if we are on a non-IIS environment, it returns false.
+		// If we need to test IIS path, we might need more complex mocking or just rely on the final filter.
+
+		if ( null !== $filter_val ) {
+			add_filter( 'got_url_rewrite', $filter_val ? '__return_true' : '__return_false' );
+		}
+
+		$this->assertSame( $expected, got_url_rewrite() );
+
+		// Cleanup.
+		remove_filter( 'got_rewrite', $mod_rewrite ? '__return_true' : '__return_false' );
+		if ( null !== $filter_val ) {
+			remove_filter( 'got_url_rewrite', $filter_val ? '__return_true' : '__return_false' );
+	}
+
+  /**
+  * Data provider for test_got_url_rewrite.
+  *
+  * @return array<string, array{
+  *     expected:    bool,
+  *     mod_rewrite: bool,
+  *     is_nginx:    bool,
+  *     is_caddy:    bool,
+  *     iis7_perm:   bool,
+  *     filter_val?: bool|null,
+  * }>
+  */
+	public function data_got_url_rewrite(): array {
+		return array(
+			'All false'                    => array(
+				'expected'    => false,
+				'mod_rewrite' => false,
+				'is_nginx'    => false,
+				'is_caddy'    => false,
+				'iis7_perm'   => false,
+			),
+			'Apache mod_rewrite supported' => array(
+				'expected'    => true,
+				'mod_rewrite' => true,
+				'is_nginx'    => false,
+				'is_caddy'    => false,
+				'iis7_perm'   => false,
+			),
+			'Nginx supported'              => array(
+				'expected'    => true,
+				'mod_rewrite' => false,
+				'is_nginx'    => true,
+				'is_caddy'    => false,
+				'iis7_perm'   => false,
+			),
+			'Caddy supported'              => array(
+				'expected'    => true,
+				'mod_rewrite' => false,
+				'is_nginx'    => false,
+				'is_caddy'    => true,
+				'iis7_perm'   => false,
+			),
+			'Filter overrides to true'     => array(
+				'expected'    => true,
+				'mod_rewrite' => false,
+				'is_nginx'    => false,
+				'is_caddy'    => false,
+				'iis7_perm'   => false,
+				'filter_val'  => true,
+			),
+			'Filter overrides to false'    => array(
+				'expected'    => false,
+				'mod_rewrite' => true,
+				'is_nginx'    => true,
+				'is_caddy'    => true,
+				'iis7_perm'   => true,
+				'filter_val'  => false,
+			),
+		);
+	}
+}