diff --git a/dlls/d3dx9_36/tests/surface.c b/dlls/d3dx9_36/tests/surface.c
index 2f8149fd01a..11bc3159bb9 100644
--- a/dlls/d3dx9_36/tests/surface.c
+++ b/dlls/d3dx9_36/tests/surface.c
@@ -181,6 +181,23 @@ static const BYTE dds_dxt5[] =
     0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0xef,0x87,0x0f,0x78,0x05,0x05,0x50,0x50,
 };
 
+/* 8x8 dxt5 */
+static const BYTE dds_dxt5_8_8[] =
+{
+    0x44,0x44,0x53,0x20,0x7c,0x00,0x00,0x00,0x07,0x10,0x08,0x00,0x08,0x00,0x00,0x00,
+    0x08,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x00,0x00,
+    0x04,0x00,0x00,0x00,0x44,0x58,0x54,0x35,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x10,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x1f,0x00,0xe0,0x07,0x05,0x05,0x50,0x50,
+    0x3f,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xf8,0xff,0x07,0x05,0x05,0x50,0x50,
+    0x7f,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x1f,0xf8,0xe0,0xff,0x05,0x05,0x50,0x50,
+    0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0x00,0x00,0x05,0x05,0x50,0x50,
+};
+
 static HRESULT create_file(const char *filename, const unsigned char *data, const unsigned int size)
 {
     DWORD received;
@@ -729,13 +746,13 @@ static void test_D3DXLoadSurface(IDirect3DDevice9 *device)
     IDirect3DSurface9 *surf, *newsurf;
     RECT rect, destrect;
     D3DLOCKED_RECT lockrect;
-    const WORD pixdata_a8r3g3b2[] = { 0x57df, 0x98fc, 0xacdd, 0xc891 };
-    const WORD pixdata_a1r5g5b5[] = { 0x46b5, 0x99c8, 0x06a2, 0x9431 };
-    const WORD pixdata_r5g6b5[] = { 0x9ef6, 0x658d, 0x0aee, 0x42ee };
-    const WORD pixdata_a8l8[] = { 0xff00, 0x00ff, 0xff30, 0x7f7f };
-    const DWORD pixdata_g16r16[] = { 0x07d23fbe, 0xdc7f44a4, 0xe4d8976b, 0x9a84fe89 };
-    const DWORD pixdata_a8b8g8r8[] = { 0xc3394cf0, 0x235ae892, 0x09b197fd, 0x8dc32bf6 };
-    const DWORD pixdata_a2r10g10b10[] = { 0x57395aff, 0x5b7668fd, 0xb0d856b5, 0xff2c61d6 };
+    static const WORD pixdata_a8r3g3b2[] = { 0x57df, 0x98fc, 0xacdd, 0xc891 };
+    static const WORD pixdata_a1r5g5b5[] = { 0x46b5, 0x99c8, 0x06a2, 0x9431 };
+    static const WORD pixdata_r5g6b5[] = { 0x9ef6, 0x658d, 0x0aee, 0x42ee };
+    static const WORD pixdata_a8l8[] = { 0xff00, 0x00ff, 0xff30, 0x7f7f };
+    static const DWORD pixdata_g16r16[] = { 0x07d23fbe, 0xdc7f44a4, 0xe4d8976b, 0x9a84fe89 };
+    static const DWORD pixdata_a8b8g8r8[] = { 0xc3394cf0, 0x235ae892, 0x09b197fd, 0x8dc32bf6 };
+    static const DWORD pixdata_a2r10g10b10[] = { 0x57395aff, 0x5b7668fd, 0xb0d856b5, 0xff2c61d6 };
 
     hr = create_file("testdummy.bmp", noimage, sizeof(noimage));  /* invalid image */
     testdummy_ok = SUCCEEDED(hr);
@@ -1303,8 +1320,30 @@ static void test_D3DXLoadSurface(IDirect3DDevice9 *device)
                     D3DFMT_DXT5, 16, NULL, &rect, D3DX_FILTER_POINT, 0);
             ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
 
-            check_release((IUnknown*)newsurf, 1);
-            check_release((IUnknown*)tex, 0);
+            check_release((IUnknown *)newsurf, 1);
+            check_release((IUnknown *)tex, 0);
+
+            /* More misalignment tests. */
+            hr = IDirect3DDevice9_CreateTexture(device, 8, 8, 1, 0, D3DFMT_DXT5, D3DPOOL_SYSTEMMEM, &tex, NULL);
+            ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
+            hr = IDirect3DTexture9_GetSurfaceLevel(tex, 0, &newsurf);
+            ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
+
+            SetRect(&rect, 2, 2, 6, 6);
+            hr = D3DXLoadSurfaceFromMemory(newsurf, NULL, NULL, &dds_dxt5_8_8[128],
+                    D3DFMT_DXT5, 16 * 2, NULL, &rect, D3DX_FILTER_POINT, 0);
+            todo_wine ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
+
+            hr = D3DXLoadSurfaceFromMemory(newsurf, NULL, &rect, &dds_dxt5_8_8[128],
+                    D3DFMT_DXT5, 16 * 2, NULL, NULL, D3DX_FILTER_POINT, 0);
+            ok(hr == D3DERR_INVALIDCALL, "Got unexpected hr %#x.\n", hr);
+
+            hr = D3DXLoadSurfaceFromMemory(newsurf, NULL, &rect, &dds_dxt5_8_8[128],
+                    D3DFMT_DXT5, 16 * 2, NULL, &rect, D3DX_FILTER_POINT, 0);
+            todo_wine ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
+
+            check_release((IUnknown *)newsurf, 1);
+            check_release((IUnknown *)tex, 0);
         }
 
         hr = IDirect3DDevice9_CreateTexture(device, 4, 4, 1, 0, D3DFMT_DXT1, D3DPOOL_SYSTEMMEM, &tex, NULL);