diff --git a/dlls/ddraw/tests/d3d.c b/dlls/ddraw/tests/d3d.c
index 8bb517c3136..9c01ef0d383 100644
--- a/dlls/ddraw/tests/d3d.c
+++ b/dlls/ddraw/tests/d3d.c
@@ -3874,6 +3874,56 @@ static void BackBuffer3DAttachmentTest(void)
     DestroyWindow(window);
 }
 
+static void test_window_style(void)
+{
+    LONG style, exstyle, tmp;
+    RECT fullscreen_rect, r;
+    IDirectDraw7 *ddraw7;
+    HWND window;
+    HRESULT hr;
+    ULONG ref;
+
+    hr = pDirectDrawCreateEx(NULL, (void **)&ddraw7, &IID_IDirectDraw7, NULL);
+    if (FAILED(hr))
+    {
+        skip("Failed to create IDirectDraw7 object (%#x), skipping tests.\n", hr);
+        return;
+    }
+
+    window = CreateWindowA("static", "d3d7_test", WS_OVERLAPPEDWINDOW,
+            0, 0, 100, 100, 0, 0, 0, 0);
+
+    style = GetWindowLongA(window, GWL_STYLE);
+    exstyle = GetWindowLongA(window, GWL_EXSTYLE);
+    SetRect(&fullscreen_rect, 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN));
+
+    hr = IDirectDraw7_SetCooperativeLevel(ddraw7, window, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN);
+    ok(SUCCEEDED(hr), "SetCooperativeLevel failed, hr %#x.\n", hr);
+    if (FAILED(hr))
+    {
+        IDirectDraw7_Release(ddraw7);
+        DestroyWindow(window);
+        return;
+    }
+
+    tmp = GetWindowLongA(window, GWL_STYLE);
+    todo_wine ok(tmp == style, "Expected window style %#x, got %#x.\n", style, tmp);
+    tmp = GetWindowLongA(window, GWL_EXSTYLE);
+    todo_wine ok(tmp == exstyle, "Expected window extended style %#x, got %#x.\n", exstyle, tmp);
+
+    GetWindowRect(window, &r);
+    ok(EqualRect(&r, &fullscreen_rect), "Expected {%d, %d, %d, %d}, got {%d, %d, %d, %d}.\n",
+            fullscreen_rect.left, fullscreen_rect.top, fullscreen_rect.right, fullscreen_rect.bottom,
+            r.left, r.top, r.right, r.bottom);
+    GetClientRect(window, &r);
+    todo_wine ok(!EqualRect(&r, &fullscreen_rect), "Client rect and window rect are equal.\n");
+
+    ref = IDirectDraw7_Release(ddraw7);
+    ok(ref == 0, "The ddraw object was not properly freed: refcount %u.\n", ref);
+
+    DestroyWindow(window);
+}
+
 START_TEST(d3d)
 {
     init_function_pointers();
@@ -3915,4 +3965,5 @@ START_TEST(d3d)
     }
 
     test_wndproc();
+    test_window_style();
 }