diff --git a/tests/phpunit/tests/compat/arrayKeyFirst.php b/tests/phpunit/tests/compat/arrayKeyFirst.php
index 2feae8e250..613845aba0 100644
--- a/tests/phpunit/tests/compat/arrayKeyFirst.php
+++ b/tests/phpunit/tests/compat/arrayKeyFirst.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::array_key_first
  */
 class Tests_Compat_arrayKeyFirst extends WP_UnitTestCase {
 
diff --git a/tests/phpunit/tests/compat/arrayKeyLast.php b/tests/phpunit/tests/compat/arrayKeyLast.php
index c41e05ca0f..77510c8320 100644
--- a/tests/phpunit/tests/compat/arrayKeyLast.php
+++ b/tests/phpunit/tests/compat/arrayKeyLast.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::array_key_last
  */
 class Tests_Compat_ArrayKeyLast extends WP_UnitTestCase {
 
diff --git a/tests/phpunit/tests/compat/hashHmac.php b/tests/phpunit/tests/compat/hashHmac.php
index 81053b043b..f9a61d5fac 100644
--- a/tests/phpunit/tests/compat/hashHmac.php
+++ b/tests/phpunit/tests/compat/hashHmac.php
@@ -3,6 +3,7 @@
 /**
  * @group compat
  *
+ * @covers ::hash_hmac
  * @covers ::_hash_hmac
  */
 class Tests_Compat_hashHmac extends WP_UnitTestCase {
diff --git a/tests/phpunit/tests/compat/isCountable.php b/tests/phpunit/tests/compat/isCountable.php
index e533cd7afa..66bf3c8c6c 100644
--- a/tests/phpunit/tests/compat/isCountable.php
+++ b/tests/phpunit/tests/compat/isCountable.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::is_countable
  */
 class Tests_Compat_isCountable extends WP_UnitTestCase {
 
diff --git a/tests/phpunit/tests/compat/isIterable.php b/tests/phpunit/tests/compat/isIterable.php
index e78b7c3913..e09bb18278 100644
--- a/tests/phpunit/tests/compat/isIterable.php
+++ b/tests/phpunit/tests/compat/isIterable.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::is_iterable
  */
 class Tests_Compat_isIterable extends WP_UnitTestCase {
 
diff --git a/tests/phpunit/tests/compat/mbStrlen.php b/tests/phpunit/tests/compat/mbStrlen.php
index 39117abb87..e34b44534b 100644
--- a/tests/phpunit/tests/compat/mbStrlen.php
+++ b/tests/phpunit/tests/compat/mbStrlen.php
@@ -4,6 +4,7 @@
  * @group compat
  * @group security-153
  *
+ * @covers ::mb_strlen
  * @covers ::_mb_strlen
  */
 class Tests_Compat_mbStrlen extends WP_UnitTestCase {
diff --git a/tests/phpunit/tests/compat/mbSubstr.php b/tests/phpunit/tests/compat/mbSubstr.php
index 142459dd78..f03f5f0f19 100644
--- a/tests/phpunit/tests/compat/mbSubstr.php
+++ b/tests/phpunit/tests/compat/mbSubstr.php
@@ -4,6 +4,7 @@
  * @group compat
  * @group security-153
  *
+ * @covers ::mb_substr
  * @covers ::_mb_substr
  */
 class Tests_Compat_mbSubstr extends WP_UnitTestCase {
diff --git a/tests/phpunit/tests/compat/strContains.php b/tests/phpunit/tests/compat/strContains.php
index 6a794851d7..c49cb19f23 100644
--- a/tests/phpunit/tests/compat/strContains.php
+++ b/tests/phpunit/tests/compat/strContains.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::str_contains
  */
 class Tests_Compat_strContains extends WP_UnitTestCase {
 
diff --git a/tests/phpunit/tests/compat/strEndsWith.php b/tests/phpunit/tests/compat/strEndsWith.php
index 18f9d6f824..75522d6f49 100644
--- a/tests/phpunit/tests/compat/strEndsWith.php
+++ b/tests/phpunit/tests/compat/strEndsWith.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::str_ends_with
  */
 class Tests_Compat_StrEndsWith extends WP_UnitTestCase {
 
diff --git a/tests/phpunit/tests/compat/strStartsWith.php b/tests/phpunit/tests/compat/strStartsWith.php
index cbe926c662..9e12ced33b 100644
--- a/tests/phpunit/tests/compat/strStartsWith.php
+++ b/tests/phpunit/tests/compat/strStartsWith.php
@@ -3,7 +3,7 @@
 /**
  * @group compat
  *
- * @coversNothing
+ * @covers ::str_starts_with
  */
 class Tests_Compat_StrStartsWith extends WP_UnitTestCase {