diff --git a/include/pybind11/cast.h b/include/pybind11/cast.h
index d45b49c52..4cc94aa48 100644
--- a/include/pybind11/cast.h
+++ b/include/pybind11/cast.h
@@ -1491,7 +1491,7 @@ private:
                                                         type_id<T>());
 #endif
         }
-        args_list.append(o);
+        args_list.append(std::move(o));
     }
 
     void process(list &args_list, detail::args_proxy ap) {
diff --git a/include/pybind11/numpy.h b/include/pybind11/numpy.h
index 7624c9fbf..d45fe4280 100644
--- a/include/pybind11/numpy.h
+++ b/include/pybind11/numpy.h
@@ -640,9 +640,9 @@ private:
 
         list names, formats, offsets;
         for (auto &descr : field_descriptors) {
-            names.append(descr.name);
-            formats.append(descr.format);
-            offsets.append(descr.offset);
+            names.append(std::move(descr.name));
+            formats.append(std::move(descr.format));
+            offsets.append(std::move(descr.offset));
         }
         return dtype(std::move(names), std::move(formats), std::move(offsets), itemsize);
     }
diff --git a/include/pybind11/stl.h b/include/pybind11/stl.h
index 3d1ca7ac2..51b57a92b 100644
--- a/include/pybind11/stl.h
+++ b/include/pybind11/stl.h
@@ -79,7 +79,7 @@ struct set_caster {
         for (auto &&value : src) {
             auto value_ = reinterpret_steal<object>(
                 key_conv::cast(forward_like<T>(value), policy, parent));
-            if (!value_ || !s.add(value_)) {
+            if (!value_ || !s.add(std::move(value_))) {
                 return handle();
             }
         }