diff --git a/tests/Integration/CoAuthorsPlusTest.php b/tests/Integration/CoAuthorsPlusTest.php
index 89c27f76..25172ed6 100644
--- a/tests/Integration/CoAuthorsPlusTest.php
+++ b/tests/Integration/CoAuthorsPlusTest.php
@@ -944,8 +944,8 @@ public function test_append_post_author_who_has_not_been_linked() {
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author2->user_login,
-				$this->author3->user_login,
+				$this->author2,
+				$this->author3,
 			]
 		);
 	}
@@ -988,9 +988,9 @@ public function test_assign_post_authors_from_authors_who_have_not_been_linked()
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author3->user_login,
-				$this->editor1->user_login,
-				$this->author2->user_login,
+				$this->author3,
+				$this->editor1,
+				$this->author2,
 			]
 		);
 	}
@@ -1150,9 +1150,9 @@ public function test_append_post_authors_from_coauthors_who_have_not_been_linked
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author1->user_login,
-				$guest_author_1->user_login,
-				$guest_author_2->user_login,
+				$this->author1,
+				$guest_author_1,
+				$guest_author_2,
 			]
 		);
 	}
@@ -1217,8 +1217,8 @@ public function test_assign_coauthors_from_coauthors_and_user_who_have_not_been_
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author3->user_login,
-				$guest_author_1->user_login,
+				$this->author3,
+				$guest_author_1,
 			]
 		);
 	}
@@ -1283,9 +1283,9 @@ public function test_append_coauthors_from_coauthors_and_user_who_have_not_been_
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author1->user_login,
-				$this->author3->user_login,
-				$guest_author_1->user_login,
+				$this->author1,
+				$this->author3,
+				$guest_author_1,
 			]
 		);
 	}
@@ -1347,8 +1347,8 @@ public function test_assign_post_authors_from_coauthors_who_are_linked() {
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author2->user_login,
-				$this->author3->user_login,
+				$this->author2,
+				$this->author3,
 			]
 		);
 	}
@@ -1419,9 +1419,9 @@ public function test_append_post_authors_from_coauthors_one_of_whom_is_linked()
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->editor1->user_login,
-				$guest_author_1->user_login,
-				$this->author3->user_login,
+				$this->editor1,
+				$guest_author_1,
+				$this->author3,
 			]
 		);
 	}
@@ -1493,9 +1493,9 @@ public function test_assign_multiple_post_authors_wp_user_guest_author_linked_us
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author1->user_login,
-				$guest_author_1->user_login,
-				$this->author3->user_login,
+				$this->author1,
+				$guest_author_1,
+				$this->author3,
 			]
 		);
 	}
@@ -1581,9 +1581,9 @@ public function test_assign_multiple_post_authors_only_one_linked_passed_last()
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author3->user_login,
-				$guest_author_1->user_login,
-				$guest_author_2->user_login,
+				$this->author3,
+				$guest_author_1,
+				$guest_author_2,
 			]
 		);
 	}
@@ -1653,9 +1653,9 @@ public function test_assign_multiple_post_authors_one_user_before_one_linked_pas
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author2->user_login,
-				$this->author3->user_login,
-				$guest_author_1->user_login,
+				$this->author2,
+				$this->author3,
+				$guest_author_1,
 			]
 		);
 	}
@@ -1726,9 +1726,9 @@ public function test_assign_multiple_post_authors_one_linked_passed_first() {
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author2->user_login,
-				$this->author3->user_login,
-				$guest_author_1->user_login,
+				$this->author2,
+				$this->author3,
+				$guest_author_1,
 			]
 		);
 	}
@@ -1800,9 +1800,9 @@ public function test_assign_multiple_post_authors_one_linked_passed_using_user_l
 		$this->assertPostHasCoAuthors(
 			$post_id,
 			[
-				$this->author2->user_login,
-				$this->author3->user_login,
-				$guest_author_1->user_login,
+				$this->author2,
+				$this->author3,
+				$guest_author_1,
 			]
 		);