From 6dd0d7810ac245430f3d16dcbce0c490c3e03d28 Mon Sep 17 00:00:00 2001
From: Deepak Cherian <deepak@cherian.net>
Date: Wed, 3 Jan 2024 16:53:12 -0700
Subject: [PATCH] Fix mode="w-" test

---
 xarray/backends/api.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/xarray/backends/api.py b/xarray/backends/api.py
index adda9770c47..b4802849e0c 100644
--- a/xarray/backends/api.py
+++ b/xarray/backends/api.py
@@ -1958,7 +1958,13 @@ def initialize_zarr(
             mode=mode,
             storage_options=kwargs.get("storage_options", None),
         )
-        # TODO: Handle mode="w-", this isn't raising an error yet.
+        if mode == "w-":
+            zarr.open_group(
+                store,
+                mode=mode,
+                storage_options=kwargs.get("storage_options", None),
+                path=kwargs.get("group", None),
+            )
 
     if TYPE_CHECKING:
         assert isinstance(store, MutableMapping)