diff --git a/dlib/test/dnn.cpp b/dlib/test/dnn.cpp
index c8dcd286c..df8d436e4 100644
--- a/dlib/test/dnn.cpp
+++ b/dlib/test/dnn.cpp
@@ -696,6 +696,11 @@ namespace
 
     void test_layers()
     {
+        {
+            print_spinner();
+            max_pool_ l;
+            DLIB_TEST_MSG(test_layer(l), test_layer(l));
+        }
         {
             print_spinner();
             affine_ l;