diff --git a/tests/phpunit/tests/functions/wpRemoteFopen.php b/tests/phpunit/tests/functions/wpRemoteFopen.php
new file mode 100644
index 0000000000..3f87138ff1
--- /dev/null
+++ b/tests/phpunit/tests/functions/wpRemoteFopen.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ * @group http
+ * @group external-http
+ * @group functions.php
+ */
+class Tests_wp_remote_fopen extends WP_UnitTestCase {
+
+	/**
+	 * @ticket 48845
+	 */
+	public function test_wp_remote_fopen_empty() {
+		$this->assertFalse( wp_remote_fopen( '' ) );
+	}
+
+	/**
+	 * @ticket 48845
+	 */
+	public function test_wp_remote_fopen_bad_url() {
+		$this->assertFalse( wp_remote_fopen( 'wp.com' ) );
+	}
+
+	/**
+	 * @ticket 48845
+	 */
+	public function test_wp_remote_fopen() {
+		// This URL gives a direct 200 response.
+		$url      = 'https://asdftestblog1.files.wordpress.com/2007/09/2007-06-30-dsc_4700-1.jpg';
+		$response = wp_remote_fopen( $url );
+
+		$this->assertInternalType( 'string', $response );
+		$this->assertEquals( 40148, strlen( $response ) );
+	}
+}