diff --git a/dlls/quartz/tests/videorenderer.c b/dlls/quartz/tests/videorenderer.c
index b2202d7ae7f..2b4b1669589 100644
--- a/dlls/quartz/tests/videorenderer.c
+++ b/dlls/quartz/tests/videorenderer.c
@@ -1391,11 +1391,11 @@ static void test_video_window_style(IVideoWindow *window, HWND hwnd, HWND our_hw
 
     hr = IVideoWindow_get_WindowStyle(window, &style);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
+    ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
             "Got style %#x.\n", style);
 
     style = GetWindowLongA(hwnd, GWL_STYLE);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
+    ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
             "Got style %#x.\n", style);
 
     hr = IVideoWindow_put_WindowStyle(window, style | WS_DISABLED);
@@ -1414,10 +1414,10 @@ static void test_video_window_style(IVideoWindow *window, HWND hwnd, HWND our_hw
 
     hr = IVideoWindow_get_WindowStyle(window, &style);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
+    ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
 
     style = GetWindowLongA(hwnd, GWL_STYLE);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
+    ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
 
     ok(GetActiveWindow() == our_hwnd, "Got active window %p.\n", GetActiveWindow());
 
diff --git a/dlls/quartz/tests/vmr7.c b/dlls/quartz/tests/vmr7.c
index af5d2b4acae..008c84ab30f 100644
--- a/dlls/quartz/tests/vmr7.c
+++ b/dlls/quartz/tests/vmr7.c
@@ -1525,11 +1525,11 @@ static void test_video_window_style(IVideoWindow *window, HWND hwnd, HWND our_hw
 
     hr = IVideoWindow_get_WindowStyle(window, &style);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
+    ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
             "Got style %#x.\n", style);
 
     style = GetWindowLongA(hwnd, GWL_STYLE);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
+    ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
             "Got style %#x.\n", style);
 
     hr = IVideoWindow_put_WindowStyle(window, style | WS_DISABLED);
@@ -1548,10 +1548,10 @@ static void test_video_window_style(IVideoWindow *window, HWND hwnd, HWND our_hw
 
     hr = IVideoWindow_get_WindowStyle(window, &style);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
+    ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
 
     style = GetWindowLongA(hwnd, GWL_STYLE);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
+    ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
 
     ok(GetActiveWindow() == our_hwnd, "Got active window %p.\n", GetActiveWindow());
 
diff --git a/dlls/quartz/tests/vmr9.c b/dlls/quartz/tests/vmr9.c
index 5d5c7a47561..fd6901d2117 100644
--- a/dlls/quartz/tests/vmr9.c
+++ b/dlls/quartz/tests/vmr9.c
@@ -1525,11 +1525,11 @@ static void test_video_window_style(IVideoWindow *window, HWND hwnd, HWND our_hw
 
     hr = IVideoWindow_get_WindowStyle(window, &style);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
+    ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
             "Got style %#x.\n", style);
 
     style = GetWindowLongA(hwnd, GWL_STYLE);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
+    ok(style == (WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW),
             "Got style %#x.\n", style);
 
     hr = IVideoWindow_put_WindowStyle(window, style | WS_DISABLED);
@@ -1548,10 +1548,10 @@ static void test_video_window_style(IVideoWindow *window, HWND hwnd, HWND our_hw
 
     hr = IVideoWindow_get_WindowStyle(window, &style);
     ok(hr == S_OK, "Got hr %#x.\n", hr);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
+    ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
 
     style = GetWindowLongA(hwnd, GWL_STYLE);
-    todo_wine ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
+    ok(style == (WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW), "Got style %#x.\n", style);
 
     ok(GetActiveWindow() == our_hwnd, "Got active window %p.\n", GetActiveWindow());
 
diff --git a/dlls/strmbase/window.c b/dlls/strmbase/window.c
index 04132aaab19..07a12eca26b 100644
--- a/dlls/strmbase/window.c
+++ b/dlls/strmbase/window.c
@@ -118,7 +118,8 @@ HRESULT WINAPI BaseWindowImpl_PrepareWindow(BaseWindow *This)
         return E_FAIL;
     }
 
-    This->hWnd = CreateWindowExW(0, class_nameW, windownameW, WS_SIZEBOX,
+    This->hWnd = CreateWindowExW(0, class_nameW, windownameW,
+            WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
             CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
             NULL, NULL, NULL, NULL);