diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fa634a1..9a19915 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,6 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         php:
+          - 8.1
           - 8.2
           - 8.3
           - 8.4
diff --git a/composer.json b/composer.json
index 414d680..a07caa6 100644
--- a/composer.json
+++ b/composer.json
@@ -5,12 +5,12 @@
     "license": "MPL-2.0",
 
     "require": {
-        "php": "^8.2",
-        "illuminate/support": "^11.0|^12.0"
+        "php": "^8.1",
+        "illuminate/support": "^10.0|^11.0|^12.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.84",
-        "orchestra/testbench": "^9.0|^10.0"
+        "orchestra/testbench": "^8.0|^9.0|^10.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/IntBackedEnum/ArrayableTest.php b/tests/IntBackedEnum/ArrayableTest.php
index 8ce69ce..f8ba6a9 100644
--- a/tests/IntBackedEnum/ArrayableTest.php
+++ b/tests/IntBackedEnum/ArrayableTest.php
@@ -19,7 +19,6 @@ public function it_can_list_names_of_an_int_backed_enum(): void
         $this->assertIsArray($names);
         $this->assertCount(5, $names);
         $this->assertSame($expected, $names);
-        $this->assertContainsOnlyString($names);
     }
 
     #[Test]
@@ -31,7 +30,6 @@ public function it_can_list_values_of_an_int_backed_enum(): void
         $this->assertIsArray($values);
         $this->assertCount(5, $values);
         $this->assertSame($expected, $values);
-        $this->assertContainsOnlyInt($values);
     }
 
     #[Test]
@@ -49,6 +47,5 @@ public function it_can_list_options_of_an_int_backed_enum(): void
         $this->assertIsArray($options);
         $this->assertCount(5, $options);
         $this->assertSame($expected, $options);
-        $this->assertContainsOnlyString($options);
     }
 }
diff --git a/tests/StringBackedEnum/ArrayableTest.php b/tests/StringBackedEnum/ArrayableTest.php
index 336bfd5..46761d9 100644
--- a/tests/StringBackedEnum/ArrayableTest.php
+++ b/tests/StringBackedEnum/ArrayableTest.php
@@ -19,7 +19,6 @@ public function it_can_list_names_of_a_string_backed_enum(): void
         $this->assertIsArray($names);
         $this->assertCount(5, $names);
         $this->assertSame($expected, $names);
-        $this->assertContainsOnlyString($names);
     }
 
     #[Test]
@@ -31,7 +30,6 @@ public function it_can_list_values_of_a_string_backed_enum(): void
         $this->assertIsArray($values);
         $this->assertCount(5, $values);
         $this->assertSame($expected, $values);
-        $this->assertContainsOnlyString($values);
     }
 
     #[Test]
@@ -49,6 +47,5 @@ public function it_can_list_options_of_a_string_backed_enum(): void
         $this->assertIsArray($options);
         $this->assertCount(5, $options);
         $this->assertSame($expected, $options);
-        $this->assertContainsOnlyString($options);
     }
 }