diff --git a/tests/shader_runner.c b/tests/shader_runner.c
index 91714ab1..cfa0e2a2 100644
--- a/tests/shader_runner.c
+++ b/tests/shader_runner.c
@@ -622,7 +622,6 @@ void init_resource(struct resource *resource, const struct resource_params *para
     resource->dimension = params->dimension;
     resource->slot = params->slot;
     resource->format = params->format;
-    resource->size = params->data_size;
     resource->texel_size = params->texel_size;
     resource->width = params->width;
     resource->height = params->height;
@@ -934,6 +933,7 @@ static void parse_test_directive(struct shader_runner *runner, const char *line)
         params.slot = 0;
         params.type = RESOURCE_TYPE_VERTEX_BUFFER;
         params.dimension = RESOURCE_DIMENSION_BUFFER;
+        params.width = sizeof(quad);
         params.data = malloc(sizeof(quad));
         memcpy(params.data, quad, sizeof(quad));
         params.data_size = sizeof(quad);
@@ -1671,6 +1671,9 @@ void run_shader_tests(struct shader_runner *runner, const struct shader_runner_c
                     break;
 
                 case STATE_RESOURCE:
+                    if (current_resource.type == RESOURCE_TYPE_VERTEX_BUFFER)
+                        current_resource.width = current_resource.data_size;
+
                     /* Not every backend supports every resource type
                      * (specifically, D3D9 doesn't support UAVs and
                      * textures with data type other than float). */
diff --git a/tests/shader_runner.h b/tests/shader_runner.h
index 91a499ed..a059dacc 100644
--- a/tests/shader_runner.h
+++ b/tests/shader_runner.h
@@ -111,7 +111,6 @@ struct resource
     enum resource_dimension dimension;
 
     DXGI_FORMAT format;
-    unsigned int size;
     unsigned int texel_size;
     unsigned int width, height;
     unsigned int sample_count;
diff --git a/tests/shader_runner_d3d12.c b/tests/shader_runner_d3d12.c
index 126db6d7..0ec5e855 100644
--- a/tests/shader_runner_d3d12.c
+++ b/tests/shader_runner_d3d12.c
@@ -701,7 +701,7 @@ static bool d3d12_runner_draw(struct shader_runner *r,
             case RESOURCE_TYPE_VERTEX_BUFFER:
                 vbv.BufferLocation = ID3D12Resource_GetGPUVirtualAddress(resource->resource);
                 vbv.StrideInBytes = get_vb_stride(&runner->r, resource->r.slot);
-                vbv.SizeInBytes = resource->r.size;
+                vbv.SizeInBytes = resource->r.width;
 
                 ID3D12GraphicsCommandList_IASetVertexBuffers(command_list, resource->r.slot, 1, &vbv);
                 break;