diff --git a/tests/phpunit/tests/compat/arrayKeyFirst.php b/tests/phpunit/tests/compat/arrayKeyFirst.php
index b3b97ad464..28db82e363 100644
--- a/tests/phpunit/tests/compat/arrayKeyFirst.php
+++ b/tests/phpunit/tests/compat/arrayKeyFirst.php
@@ -24,14 +24,7 @@ class Tests_Compat_arrayKeyFirst extends WP_UnitTestCase {
 	 * @param array $arr     The array to get first key from.
 	 */
 	public function test_array_key_first( $expected, $arr ) {
-		if ( ! function_exists( 'array_key_first' ) ) {
-			$this->markTestSkipped( 'array_key_first() is not available.' );
-		} else {
-			$this->assertSame(
-				$expected,
-				array_key_first( $arr )
-			);
-		}
+		$this->assertSame( $expected, array_key_first( $arr ) );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/compat/arrayKeyLast.php b/tests/phpunit/tests/compat/arrayKeyLast.php
index 77510c8320..819e850f13 100644
--- a/tests/phpunit/tests/compat/arrayKeyLast.php
+++ b/tests/phpunit/tests/compat/arrayKeyLast.php
@@ -25,11 +25,7 @@ class Tests_Compat_ArrayKeyLast extends WP_UnitTestCase {
 	 * @param array $arr      The array to get last key from.
 	 */
 	public function test_array_key_last( $expected, $arr ) {
-		if ( ! function_exists( 'array_key_last' ) ) {
-			$this->markTestSkipped( 'array_key_last() is not available.' );
-		} else {
-			$this->assertSame( $expected, array_key_last( $arr ) );
-		}
+		$this->assertSame( $expected, array_key_last( $arr ) );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/compat/strContains.php b/tests/phpunit/tests/compat/strContains.php
index ee5bb6e1d3..381365b408 100644
--- a/tests/phpunit/tests/compat/strContains.php
+++ b/tests/phpunit/tests/compat/strContains.php
@@ -26,14 +26,7 @@ class Tests_Compat_strContains extends WP_UnitTestCase {
 	 * @param string $needle   The substring to search for in `$haystack`.
 	 */
 	public function test_str_contains( $expected, $haystack, $needle ) {
-		if ( ! function_exists( 'str_contains' ) ) {
-			$this->markTestSkipped( 'str_contains() is not available.' );
-		} else {
-			$this->assertSame(
-				$expected,
-				str_contains( $haystack, $needle )
-			);
-		}
+		$this->assertSame( $expected, str_contains( $haystack, $needle ) );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/compat/strEndsWith.php b/tests/phpunit/tests/compat/strEndsWith.php
index 7cf1e2b15d..8467675613 100644
--- a/tests/phpunit/tests/compat/strEndsWith.php
+++ b/tests/phpunit/tests/compat/strEndsWith.php
@@ -26,14 +26,7 @@ class Tests_Compat_StrEndsWith extends WP_UnitTestCase {
 	 * @param string $needle   The substring to search for at the end of `$haystack`.
 	 */
 	public function test_str_ends_with( $expected, $haystack, $needle ) {
-		if ( ! function_exists( 'str_ends_with' ) ) {
-			$this->markTestSkipped( 'str_ends_with() is not available.' );
-		} else {
-			$this->assertSame(
-				$expected,
-				str_ends_with( $haystack, $needle )
-			);
-		}
+		$this->assertSame( $expected, str_ends_with( $haystack, $needle ) );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/compat/strStartsWith.php b/tests/phpunit/tests/compat/strStartsWith.php
index 6bf72cd621..a7ea8ff3d9 100644
--- a/tests/phpunit/tests/compat/strStartsWith.php
+++ b/tests/phpunit/tests/compat/strStartsWith.php
@@ -26,14 +26,7 @@ class Tests_Compat_StrStartsWith extends WP_UnitTestCase {
 	 * @param string $needle   The substring to search for at the start of `$haystack`.
 	 */
 	public function test_str_starts_with( $expected, $haystack, $needle ) {
-		if ( ! function_exists( 'str_starts_with' ) ) {
-			$this->markTestSkipped( 'str_starts_with() is not available.' );
-		} else {
-			$this->assertSame(
-				$expected,
-				str_starts_with( $haystack, $needle )
-			);
-		}
+		$this->assertSame( $expected, str_starts_with( $haystack, $needle ) );
 	}
 
 	/**