diff --git a/tests/stl_utils.c b/tests/stl_utils.c
index 7977364..261f0c9 100644
--- a/tests/stl_utils.c
+++ b/tests/stl_utils.c
@@ -147,3 +147,11 @@ gmio_bool_t gmio_stl_triangle_equal(
             && gmio_stl_coords_equal(&lhs->v3, &rhs->v3, max_ulp_diff)
             && lhs->attribute_byte_count == rhs->attribute_byte_count;
 }
+
+void gmio_stl_nop_get_triangle(
+        const void *cookie, uint32_t tri_id, gmio_stl_triangle_t *triangle)
+{
+    GMIO_UNUSED(cookie);
+    GMIO_UNUSED(tri_id);
+    GMIO_UNUSED(triangle);
+}
diff --git a/tests/stl_utils.h b/tests/stl_utils.h
index d30b07a..0dc616a 100644
--- a/tests/stl_utils.h
+++ b/tests/stl_utils.h
@@ -49,6 +49,10 @@ void gmio_stlb_header_to_printable_string(
 void gmio_stl_nop_add_triangle(
         void* cookie, uint32_t tri_id, const gmio_stl_triangle_t* triangle);
 
+/*! Callback for gmio_stl_mesh::func_get_triangle that does nothing */
+void gmio_stl_nop_get_triangle(
+        const void* cookie, uint32_t tri_id, gmio_stl_triangle_t* triangle);
+
 /*! Holds an array of STL triangles */
 struct gmio_stl_triangle_array
 {