diff --git a/Tests/SplashTests/Tests/DeclarationTests.swift b/Tests/SplashTests/Tests/DeclarationTests.swift
index 30a4fc8..3fe7452 100644
--- a/Tests/SplashTests/Tests/DeclarationTests.swift
+++ b/Tests/SplashTests/Tests/DeclarationTests.swift
@@ -547,7 +547,8 @@ extension DeclarationTests {
             ("testPropertyDeclarationWithWillSet", testPropertyDeclarationWithWillSet),
             ("testPropertyDeclarationWithDidSet", testPropertyDeclarationWithDidSet),
             ("testSubscriptDeclaration", testSubscriptDeclaration),
-            ("testDeferDeclaration", testDeferDeclaration)
+            ("testDeferDeclaration", testDeferDeclaration),
+            ("testFunctionDeclarationWithInOutParameter", testFunctionDeclarationWithInOutParameter)
         ]
     }
 }