diff --git a/Path.php b/Path.php
index 858e1623e..eb6d8ea08 100644
--- a/Path.php
+++ b/Path.php
@@ -368,7 +368,7 @@ public static function isAbsolute(string $path): bool
         }
 
         // Strip scheme
-        if (false !== $schemeSeparatorPosition = strpos($path, '://')) {
+        if (false !== ($schemeSeparatorPosition = strpos($path, '://')) && 1 !== $schemeSeparatorPosition) {
             $path = substr($path, $schemeSeparatorPosition + 3);
         }
 
diff --git a/Tests/PathTest.php b/Tests/PathTest.php
index 77b9f2a2d..17c6142c3 100644
--- a/Tests/PathTest.php
+++ b/Tests/PathTest.php
@@ -375,6 +375,8 @@ public static function provideIsAbsolutePathTests(): \Generator
 
         yield ['C:/css/style.css', true];
         yield ['D:/', true];
+        yield ['C:///windows', true];
+        yield ['C://test', true];
 
         yield ['E:\\css\\style.css', true];
         yield ['F:\\', true];