diff --git a/CMakeLists.txt b/CMakeLists.txt
index 988f48dc..4eda2be8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,6 +96,8 @@ compiled_test(test/array_storage_test.cpp)
 compiled_test(test/axis_test.cpp)
 compiled_test(test/detail_test.cpp)
 compiled_test(test/histogram_dynamic_add_fail.cpp)
+compiled_test(test/histogram_dynamic_fill_one_dimensional_vector_fail.cpp)
+compiled_test(test/histogram_dynamic_fill_one_dimensional_tuple_fail.cpp)
 compiled_test(test/histogram_dynamic_at_tuple_wrong_dimension_fail.cpp)
 compiled_test(test/histogram_dynamic_at_vector_wrong_dimension_fail.cpp)
 compiled_test(test/histogram_dynamic_at_wrong_dimension_fail.cpp)
diff --git a/test/histogram_dynamic_fill_one_dimensional_tuple_fail.cpp b/test/histogram_dynamic_fill_one_dimensional_tuple_fail.cpp
new file mode 100644
index 00000000..9ca22f44
--- /dev/null
+++ b/test/histogram_dynamic_fill_one_dimensional_tuple_fail.cpp
@@ -0,0 +1,14 @@
+// Copyright 2018 Hans Dembinski
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/histogram.hpp>
+#include <tuple>
+
+using namespace boost::histogram;
+int main() {
+  auto a = make_dynamic_histogram(axis::integer<>(0, 2));
+  a(std::make_tuple(1));
+}
diff --git a/test/histogram_dynamic_fill_one_dimensional_vector_fail.cpp b/test/histogram_dynamic_fill_one_dimensional_vector_fail.cpp
new file mode 100644
index 00000000..9baeeba2
--- /dev/null
+++ b/test/histogram_dynamic_fill_one_dimensional_vector_fail.cpp
@@ -0,0 +1,14 @@
+// Copyright 2018 Hans Dembinski
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/histogram.hpp>
+#include <vector>
+
+using namespace boost::histogram;
+int main() {
+  auto a = make_dynamic_histogram(axis::integer<>(0, 2));
+  a(std::vector<int>(1));
+}
diff --git a/test/histogram_test.cpp b/test/histogram_test.cpp
index 98966523..41936d0d 100644
--- a/test/histogram_test.cpp
+++ b/test/histogram_test.cpp
@@ -775,6 +775,14 @@ void run_tests() {
     auto i = {1, 1};
     BOOST_TEST_EQ(h.at(i).variance(), 5);
     BOOST_TEST_EQ(h[i].variance(), 5);
+
+    // also test special case of 1-dimensional histogram, which should unpack
+    // the argument in the "at" call, even though they do not unpack in the
+    // operator() call (because that is ambiguous)
+    auto h1 = make(Tag(), axis::integer<>(0, 2));
+    h1(1);
+    BOOST_TEST_EQ(h1.at(std::make_tuple(0)), 0);
+    BOOST_TEST_EQ(h1.at(std::vector<int>(1, 1)), 1);
   }
 
   // bad bin access