From 6d480056e57cb80ea8ea0461a3ddc817e7ef4039 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20Gir=C3=A3o=20Serr=C3=A3o?=
 <5621605+rodrigogiraoserrao@users.noreply.github.com>
Date: Tue, 13 Dec 2022 16:15:28 +0000
Subject: [PATCH 1/3] Add a test for binding merging.

---
 tests/test_dom.py | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tests/test_dom.py b/tests/test_dom.py
index e925c5c14..6037abdd0 100644
--- a/tests/test_dom.py
+++ b/tests/test_dom.py
@@ -45,6 +45,39 @@ def test_validate():
         node.toggle_class("1")
 
 
+def test_inherited_bindings():
+    """Test if binding merging is done correctly when (not) inheriting bindings."""
+    class A(DOMNode):
+        BINDINGS = [("a", "a", "a")]
+
+    class B(A):
+        BINDINGS = [("b", "b", "b")]
+
+    class C(B, inherit_bindings=False):
+        BINDINGS = [("c", "c", "c")]
+
+    class D(C, inherit_bindings=False):
+        pass
+
+    class E(D):
+        BINDINGS = [("e", "e", "e")]
+
+    a = A()
+    assert list(a._bindings.keys.keys()) == ["a"]
+
+    b = B()
+    assert list(b._bindings.keys.keys()) == ["a", "b"]
+
+    c = C()
+    assert list(c._bindings.keys.keys()) == ["c"]
+
+    d = D()
+    assert not list(d._bindings.keys.keys())
+
+    e = E()
+    assert list(e._bindings.keys.keys()) == ["e"]
+
+
 @pytest.fixture
 def search():
     """

From 94c05aa876296eb4e666d6ef1f96ee40dda2c012 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20Gir=C3=A3o=20Serr=C3=A3o?=
 <5621605+rodrigogiraoserrao@users.noreply.github.com>
Date: Tue, 13 Dec 2022 16:16:04 +0000
Subject: [PATCH 2/3] Fix binding merging a la #1336

---
 src/textual/dom.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/textual/dom.py b/src/textual/dom.py
index f1232e54d..bc1d52ee5 100644
--- a/src/textual/dom.py
+++ b/src/textual/dom.py
@@ -229,7 +229,7 @@ class DOMNode(MessagePump):
             if issubclass(base, DOMNode):
                 if not base._inherit_bindings:
                     bindings.clear()
-                bindings.append(Bindings(base.BINDINGS))
+                bindings.append(Bindings(base.__dict__.get("BINDINGS", [])))
         keys = {}
         for bindings_ in bindings:
             keys.update(bindings_.keys)

From e9a5995c47ee81c501078321a5f656c38ce192cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20Gir=C3=A3o=20Serr=C3=A3o?=
 <5621605+rodrigogiraoserrao@users.noreply.github.com>
Date: Tue, 13 Dec 2022 16:19:47 +0000
Subject: [PATCH 3/3] Update changelog.

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1641b1a3..42111addd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixed issue with auto width/height and relative children https://github.com/Textualize/textual/issues/1319
 - Fixed issue with offset applied to containers https://github.com/Textualize/textual/issues/1256
 - Fixed default CSS retrieval for widgets with no `DEFAULT_CSS` that inherited from widgets with `DEFAULT_CSS` https://github.com/Textualize/textual/issues/1335
+- Fixed merging of `BINDINGS` when binding inheritance is set to `None` https://github.com/Textualize/textual/issues/1351
 
 ## [0.5.0] - 2022-11-20