diff --git a/Completion/CompletionInput.php b/Completion/CompletionInput.php
index 7ba41c08..79c2f659 100644
--- a/Completion/CompletionInput.php
+++ b/Completion/CompletionInput.php
@@ -53,7 +53,7 @@ public static function fromString(string $inputStr, int $currentIndex): self
      * Create an input based on an COMP_WORDS token list.
      *
      * @param string[] $tokens       the set of split tokens (e.g. COMP_WORDS or argv)
-     * @param          $currentIndex the index of the cursor (e.g. COMP_CWORD)
+     * @param int      $currentIndex the index of the cursor (e.g. COMP_CWORD)
      */
     public static function fromTokens(array $tokens, int $currentIndex): self
     {
diff --git a/Tests/Completion/CompletionInputTest.php b/Tests/Completion/CompletionInputTest.php
index 5b6a8e42..df0d081f 100644
--- a/Tests/Completion/CompletionInputTest.php
+++ b/Tests/Completion/CompletionInputTest.php
@@ -132,4 +132,19 @@ public static function provideFromStringData()
         yield ['bin/console cache:clear "multi word string"', ['bin/console', 'cache:clear', '"multi word string"']];
         yield ['bin/console cache:clear \'multi word string\'', ['bin/console', 'cache:clear', '\'multi word string\'']];
     }
+
+    public function testToString()
+    {
+        $input = CompletionInput::fromTokens(['foo', 'bar', 'baz'], 0);
+        $this->assertSame('foo| bar baz', (string) $input);
+
+        $input = CompletionInput::fromTokens(['foo', 'bar', 'baz'], 1);
+        $this->assertSame('foo bar| baz', (string) $input);
+
+        $input = CompletionInput::fromTokens(['foo', 'bar', 'baz'], 2);
+        $this->assertSame('foo bar baz|', (string) $input);
+
+        $input = CompletionInput::fromTokens(['foo', 'bar', 'baz'], 11);
+        $this->assertSame('foo bar baz |', (string) $input);
+    }
 }