diff --git a/src/TemporaryDirectory.php b/src/TemporaryDirectory.php
index c65d938..2fb29dd 100644
--- a/src/TemporaryDirectory.php
+++ b/src/TemporaryDirectory.php
@@ -163,7 +163,12 @@ class TemporaryDirectory
 
     protected function isFilePath(string $path): bool
     {
-        return str_contains($path, '.');
+        // Only the last segment can be a filename; a dot in a parent segment would
+        // misclassify a directory.
+        $lastSeparator = strrpos($path, DIRECTORY_SEPARATOR);
+        $lastSegment = $lastSeparator === false ? $path : substr($path, $lastSeparator + 1);
+
+        return str_contains($lastSegment, '.');
     }
 
     protected function deleteDirectory(string $path): bool
diff --git a/tests/TemporaryDirectoryTest.php b/tests/TemporaryDirectoryTest.php
index 88035fb..4ff79fa 100644
--- a/tests/TemporaryDirectoryTest.php
+++ b/tests/TemporaryDirectoryTest.php
@@ -173,6 +173,25 @@ class TemporaryDirectoryTest extends TestCase
         $this->assertDirectoryExists("{$this->temporaryDirectoryFullPath}/{$subdirectory}");
     }
 
+    /** @test */
+    public function it_can_create_a_subdirectory_when_the_location_contains_a_dot()
+    {
+        $dottedLocation = rtrim(sys_get_temp_dir(), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR.'my.dotted.location';
+        $this->deleteDirectory($dottedLocation);
+
+        $temporaryDirectory = (new TemporaryDirectory($dottedLocation))
+            ->name($this->temporaryDirectory)
+            ->create();
+
+        $subdirectory = 'abc';
+        $subdirectoryPath = $temporaryDirectory->path($subdirectory);
+
+        $this->assertDirectoryExists($subdirectoryPath);
+
+        $temporaryDirectory->delete();
+        $this->deleteDirectory($dottedLocation);
+    }
+
     /** @test */
     public function it_can_create_a_multiple_subdirectories_in_the_temporary_directory()
     {