diff --git a/tests/phpunit/tests/query/fieldsClause.php b/tests/phpunit/tests/query/fieldsClause.php
index 4522923a8a..d873857a65 100644
--- a/tests/phpunit/tests/query/fieldsClause.php
+++ b/tests/phpunit/tests/query/fieldsClause.php
@@ -54,23 +54,19 @@ class Tests_Query_FieldsClause extends WP_UnitTestCase {
 
 		$expected = array();
 		foreach ( self::$post_ids as $post_id ) {
-			// Use array_shift to populate in the reverse order.
-			array_unshift(
-				$expected,
-				(object) array(
-					'ID'          => $post_id,
-					'post_parent' => 0,
-				)
+			$expected[] = (object) array(
+				'ID'          => $post_id,
+				'post_parent' => 0,
 			);
 		}
 
-		$this->assertEquals( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
+		$this->assertEqualSets( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
 		$this->assertSame( 5, $q->found_posts, 'Number of found posts is not five.' );
 		$this->assertEquals( 1, $q->max_num_pages, 'Number of found pages is not one.' );
 
 		// Test the second query's results match.
 		$q2 = new WP_Query( $query_args );
-		$this->assertEquals( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
+		$this->assertEqualSets( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
 	}
 
 	/**
@@ -86,15 +82,15 @@ class Tests_Query_FieldsClause extends WP_UnitTestCase {
 
 		$q = new WP_Query( $query_args );
 
-		$expected = array_reverse( self::$post_ids );
+		$expected = self::$post_ids;
 
-		$this->assertEquals( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
+		$this->assertEqualSets( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
 		$this->assertSame( 5, $q->found_posts, 'Number of found posts is not five.' );
 		$this->assertEquals( 1, $q->max_num_pages, 'Number of found pages is not one.' );
 
 		// Test the second query's results match.
 		$q2 = new WP_Query( $query_args );
-		$this->assertEquals( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
+		$this->assertEqualSets( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
 	}
 
 	/**
@@ -110,15 +106,15 @@ class Tests_Query_FieldsClause extends WP_UnitTestCase {
 
 		$q = new WP_Query( $query_args );
 
-		$expected = array_map( 'get_post', array_reverse( self::$post_ids ) );
+		$expected = array_map( 'get_post', self::$post_ids );
 
-		$this->assertEquals( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
+		$this->assertEqualSets( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
 		$this->assertSame( 5, $q->found_posts, 'Number of found posts is not five.' );
 		$this->assertEquals( 1, $q->max_num_pages, 'Number of found pages is not one.' );
 
 		// Test the second query's results match.
 		$q2 = new WP_Query( $query_args );
-		$this->assertEquals( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
+		$this->assertEqualSets( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
 	}
 
 	/**
@@ -139,25 +135,21 @@ class Tests_Query_FieldsClause extends WP_UnitTestCase {
 
 		$expected = array();
 		foreach ( self::$post_ids as $post_id ) {
-			// Use array_shift to populate in the reverse order.
-			array_unshift(
-				$expected,
-				(object) array(
-					'ID'                => $post_id,
-					'post_parent'       => 0,
-					'test_post_fields'  => 1,
-					'test_post_clauses' => 2,
-				)
+			$expected[] = (object) array(
+				'ID'                => $post_id,
+				'post_parent'       => 0,
+				'test_post_fields'  => '1',
+				'test_post_clauses' => '2',
 			);
 		}
 
-		$this->assertEquals( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
+		$this->assertEqualSets( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
 		$this->assertSame( 5, $q->found_posts, 'Number of found posts is not five.' );
 		$this->assertEquals( 1, $q->max_num_pages, 'Number of found pages is not one.' );
 
 		// Test the second query's results match.
 		$q2 = new WP_Query( $query_args );
-		$this->assertEquals( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
+		$this->assertEqualSets( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
 	}
 
 	/**
@@ -176,16 +168,16 @@ class Tests_Query_FieldsClause extends WP_UnitTestCase {
 
 		$q = new WP_Query( $query_args );
 
-		// Fields => ID does not include the additional fields.
-		$expected = array_reverse( self::$post_ids );
+		// `fields => ids` does not include the additional fields.
+		$expected = self::$post_ids;
 
-		$this->assertEquals( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
+		$this->assertEqualSets( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
 		$this->assertSame( 5, $q->found_posts, 'Number of found posts is not five.' );
 		$this->assertEquals( 1, $q->max_num_pages, 'Number of found pages is not one.' );
 
 		// Test the second query's results match.
 		$q2 = new WP_Query( $query_args );
-		$this->assertEquals( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
+		$this->assertEqualSets( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
 	}
 
 	/**
@@ -204,19 +196,19 @@ class Tests_Query_FieldsClause extends WP_UnitTestCase {
 
 		$q = new WP_Query( $query_args );
 
-		$expected = array_map( 'get_post', array_reverse( self::$post_ids ) );
+		$expected = array_map( 'get_post', self::$post_ids );
 		foreach ( $expected as $post ) {
-			$post->test_post_fields  = 1;
-			$post->test_post_clauses = 2;
+			$post->test_post_fields  = '1';
+			$post->test_post_clauses = '2';
 		}
 
-		$this->assertEquals( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
+		$this->assertEqualSets( $expected, $q->posts, 'Posts property for first query is not of expected form.' );
 		$this->assertSame( 5, $q->found_posts, 'Number of found posts is not five.' );
 		$this->assertEquals( 1, $q->max_num_pages, 'Number of found pages is not one.' );
 
 		// Test the second query's results match.
 		$q2 = new WP_Query( $query_args );
-		$this->assertEquals( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
+		$this->assertEqualSets( $expected, $q2->posts, 'Posts property for second query is not in the expected form.' );
 	}
 
 	/**