diff --git a/pkgs/by-name/ha/harlequin/package.nix b/pkgs/by-name/ha/harlequin/package.nix
index c4bbad05fdcf..2d811b9825b2 100644
--- a/pkgs/by-name/ha/harlequin/package.nix
+++ b/pkgs/by-name/ha/harlequin/package.nix
@@ -25,6 +25,7 @@ python3Packages.buildPythonApplication rec {
     "numpy"
     "pyarrow"
     "textual"
+    "syrupy"
   ];
 
   build-system = with python3Packages; [ poetry-core ];