diff --git a/src/Concerns/MakesAssertions.php b/src/Concerns/MakesAssertions.php
index 30d6b9b5c..0e17b8ad0 100644
--- a/src/Concerns/MakesAssertions.php
+++ b/src/Concerns/MakesAssertions.php
@@ -585,7 +585,7 @@ public function assertAttribute($selector, $attribute, $value)
      */
     public function assertDataAttribute($selector, $attribute, $value)
     {
-        return $this->assertAttribute($selector, 'data-' . $attribute, $value);
+        return $this->assertAttribute($selector, 'data-'.$attribute, $value);
     }
 
     /**
@@ -598,7 +598,7 @@ public function assertDataAttribute($selector, $attribute, $value)
      */
     public function assertAriaAttribute($selector, $attribute, $value)
     {
-        return $this->assertAttribute($selector, 'aria-' . $attribute, $value);
+        return $this->assertAttribute($selector, 'aria-'.$attribute, $value);
     }
 
     /**
diff --git a/tests/MakesAssertionsTest.php b/tests/MakesAssertionsTest.php
index d3e33ea0c..eb5da4c37 100644
--- a/tests/MakesAssertionsTest.php
+++ b/tests/MakesAssertionsTest.php
@@ -74,7 +74,7 @@ public function test_assert_attribute()
             $this->fail();
         } catch (ExpectationFailedException $e) {
             $this->assertStringContainsString(
-                "Did not see expected attribute [bar] within element [Foo].",
+                'Did not see expected attribute [bar] within element [Foo].',
                 $e->getMessage()
             );
         }
@@ -111,7 +111,7 @@ public function test_assert_data_attribute()
             $this->fail();
         } catch (ExpectationFailedException $e) {
             $this->assertStringContainsString(
-                "Did not see expected attribute [data-bar] within element [Foo].",
+                'Did not see expected attribute [data-bar] within element [Foo].',
                 $e->getMessage()
             );
         }
@@ -148,7 +148,7 @@ public function test_assert_aria_attribute()
             $this->fail();
         } catch (ExpectationFailedException $e) {
             $this->assertStringContainsString(
-                "Did not see expected attribute [aria-bar] within element [Foo].",
+                'Did not see expected attribute [aria-bar] within element [Foo].',
                 $e->getMessage()
             );
         }