diff --git a/tests/phpunit/tests/functions/deprecated.php b/tests/phpunit/tests/functions/deprecated.php
index a9046742ad..b9b86455c1 100644
--- a/tests/phpunit/tests/functions/deprecated.php
+++ b/tests/phpunit/tests/functions/deprecated.php
@@ -143,14 +143,11 @@ class Tests_Functions_Deprecated extends WP_UnitTestCase {
 	 *
 	 * @ticket 6821
 	 * @expectedDeprecated wp_save_image_file
+	 * @requires function imagejpeg
 	 *
 	 * @covers ::wp_save_image_file
 	 */
 	public function test_wp_save_image_file_deprecated_with_gd_resource() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// Call wp_save_image_file().
 		require_once ABSPATH . 'wp-admin/includes/image-edit.php';
 		$file = wp_tempnam();
@@ -168,14 +165,11 @@ class Tests_Functions_Deprecated extends WP_UnitTestCase {
 	 * Tests that wp_save_image_file() doesn't have a deprecated argument when passed a WP_Image_Editor.
 	 *
 	 * @ticket 6821
+	 * @requires function imagejpeg
 	 *
 	 * @covers ::wp_save_image_file
 	 */
 	public function test_wp_save_image_file_not_deprecated_with_wp_image_editor() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// Call wp_save_image_file().
 		require_once ABSPATH . 'wp-admin/includes/image-edit.php';
 		$file = wp_tempnam();
diff --git a/tests/phpunit/tests/image/functions.php b/tests/phpunit/tests/image/functions.php
index eed4aa9f2e..3493c81913 100644
--- a/tests/phpunit/tests/image/functions.php
+++ b/tests/phpunit/tests/image/functions.php
@@ -348,11 +348,10 @@ class Tests_Image_Functions extends WP_UnitTestCase {
 		}
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	public function test_wp_crop_image_file() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		$file = wp_crop_image(
 			DIR_TESTDATA . '/images/canola.jpg',
 			0,
@@ -372,11 +371,10 @@ class Tests_Image_Functions extends WP_UnitTestCase {
 		unlink( $file );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	public function test_wp_crop_image_url() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		if ( ! extension_loaded( 'openssl' ) ) {
 			$this->markTestSkipped( 'Tests_Image_Functions::test_wp_crop_image_url() requires openssl.' );
 		}
diff --git a/tests/phpunit/tests/image/intermediateSize.php b/tests/phpunit/tests/image/intermediateSize.php
index 6b7427c8fa..b92c833a9d 100644
--- a/tests/phpunit/tests/image/intermediateSize.php
+++ b/tests/phpunit/tests/image/intermediateSize.php
@@ -28,31 +28,28 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 		$this->assertFalse( $image );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	function test_make_intermediate_size_width() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		$image = image_make_intermediate_size( DIR_TESTDATA . '/images/a2-small.jpg', 100, 0, false );
 
 		$this->assertInternalType( 'array', $image );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	function test_make_intermediate_size_height() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		$image = image_make_intermediate_size( DIR_TESTDATA . '/images/a2-small.jpg', 0, 75, false );
 
 		$this->assertInternalType( 'array', $image );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	function test_make_intermediate_size_successful() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		$image = image_make_intermediate_size( DIR_TESTDATA . '/images/a2-small.jpg', 100, 75, true );
 
 		$this->assertInternalType( 'array', $image );
@@ -67,12 +64,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 17626
+	 * @requires function imagejpeg
 	 */
 	function test_get_intermediate_sizes_by_name() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		add_image_size( 'test-size', 330, 220, true );
 
 		$file = DIR_TESTDATA . '/images/waffles.jpg';
@@ -91,12 +85,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 17626
+	 * @requires function imagejpeg
 	 */
 	function test_get_intermediate_sizes_by_array_exact() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// Only one dimention match shouldn't return false positive (see: #17626).
 		add_image_size( 'test-size', 330, 220, true );
 		add_image_size( 'false-height', 330, 400, true );
@@ -116,12 +107,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 17626
+	 * @requires function imagejpeg
 	 */
 	function test_get_intermediate_sizes_by_array_nearest() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// If an exact size is not found, it should be returned.
 		// If not, find nearest size that is larger (see: #17626).
 		add_image_size( 'test-size', 450, 300, true );
@@ -163,12 +151,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 17626
+	 * @requires function imagejpeg
 	 */
 	function test_get_intermediate_sizes_by_array_zero_height() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// Generate random width.
 		$random_w = rand( 300, 400 );
 
@@ -195,12 +180,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 	/**
 	 * @ticket 17626
 	 * @ticket 34087
+	 * @requires function imagejpeg
 	 */
 	function test_get_intermediate_sizes_by_array_zero_width() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// 202 is the smallest height that will trigger a miss for 'false-height'.
 		$height = 202;
 
@@ -227,12 +209,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 	/**
 	 * @ticket 17626
 	 * @ticket 34087
+	 * @requires function imagejpeg
 	 */
 	public function test_get_intermediate_sizes_should_match_size_with_off_by_one_aspect_ratio() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// Original is 600x400. 300x201 is close enough to match.
 		$width  = 300;
 		$height = 201;
@@ -254,12 +233,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 34384
+	 * @requires function imagejpeg
 	 */
 	public function test_get_intermediate_size_with_small_size_array() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		// Add a hard cropped size that matches the aspect ratio we're going to test.
 		add_image_size( 'test-size', 200, 100, true );
 
@@ -275,12 +251,9 @@ class Tests_Image_Intermediate_Size extends WP_UnitTestCase {
 
 	/**
 	 * @ticket 34384
+	 * @requires function imagejpeg
 	 */
 	public function test_get_intermediate_size_with_small_size_array_fallback() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		$file = DIR_TESTDATA . '/images/waffles.jpg';
 		$id   = $this->_make_attachment( $file, 0 );
 
diff --git a/tests/phpunit/tests/post/attachments.php b/tests/phpunit/tests/post/attachments.php
index 8f75c41b5a..0a03d77ed6 100644
--- a/tests/phpunit/tests/post/attachments.php
+++ b/tests/phpunit/tests/post/attachments.php
@@ -54,11 +54,10 @@ class Tests_Post_Attachments extends WP_UnitTestCase {
 		$this->assertSame( 50, $downsize[2] );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	function test_insert_image_thumb_only() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		update_option( 'medium_size_w', 0 );
 		update_option( 'medium_size_h', 0 );
 
@@ -106,11 +105,10 @@ class Tests_Post_Attachments extends WP_UnitTestCase {
 		$this->assertSame( 300, $downsize[2] );
 	}
 
+	/**
+	 * @requires function imagejpeg
+	 */
 	function test_insert_image_medium_sizes() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		update_option( 'medium_size_w', 400 );
 		update_option( 'medium_size_h', 0 );
 
@@ -164,12 +162,10 @@ class Tests_Post_Attachments extends WP_UnitTestCase {
 		$this->assertSame( 1024, $downsize[2] );
 	}
 
-
+	/**
+	 * @requires function imagejpeg
+	 */
 	function test_insert_image_delete() {
-		if ( ! function_exists( 'imagejpeg' ) ) {
-			$this->fail( 'jpeg support unavailable' );
-		}
-
 		update_option( 'medium_size_w', 400 );
 		update_option( 'medium_size_h', 0 );