diff --git a/test/unordered/contains_tests.cpp b/test/unordered/contains_tests.cpp
index e6123959..01654479 100644
--- a/test/unordered/contains_tests.cpp
+++ b/test/unordered/contains_tests.cpp
@@ -265,7 +265,7 @@ void test_multiset()
   test_set_non_transparent_contains<non_transparent_multiset3>();
 }
 
-UNORDERED_AUTO_TEST (contains) {
+UNORDERED_AUTO_TEST (contains_) { // avoid -Wshadow warning with `bool contains`
   test_map();
   test_multimap();
   test_set();
diff --git a/test/unordered/transparent_tests.cpp b/test/unordered/transparent_tests.cpp
index 59fb48d7..02682213 100644
--- a/test/unordered/transparent_tests.cpp
+++ b/test/unordered/transparent_tests.cpp
@@ -1108,7 +1108,7 @@ template <class UnorderedMap> void test_map_transparent_erase()
 
   UnorderedMap map;
 
-  unsigned long num_erased = 0;
+  std::size_t num_erased = 0;
 
   num_erased = map.erase(0);
   BOOST_TEST(map.empty());
@@ -1150,7 +1150,7 @@ template <class UnorderedMap> void test_map_non_transparent_erase()
 
   UnorderedMap map;
 
-  unsigned long num_erased = 0;
+  std::size_t num_erased = 0;
 
   num_erased = map.erase(0);
   BOOST_TEST(map.empty());
@@ -1248,7 +1248,7 @@ template <class UnorderedSet> void test_set_transparent_erase()
 
   UnorderedSet set;
 
-  unsigned long num_erased = 0;
+  std::size_t num_erased = 0;
 
   num_erased = set.erase(0);
   BOOST_TEST(set.empty());
@@ -1290,7 +1290,7 @@ template <class UnorderedSet> void test_set_non_transparent_erase()
 
   UnorderedSet set;
 
-  unsigned long num_erased = 0;
+  std::size_t num_erased = 0;
 
   num_erased = set.erase(0);
   BOOST_TEST(set.empty());
diff --git a/test/unordered/unnecessary_copy_tests.cpp b/test/unordered/unnecessary_copy_tests.cpp
index 1c5ff4b7..927203f9 100644
--- a/test/unordered/unnecessary_copy_tests.cpp
+++ b/test/unordered/unnecessary_copy_tests.cpp
@@ -552,8 +552,8 @@ namespace unnecessary_copy_tests {
 
     std::pair<count_copies const, count_copies> move_source_trial;
     reset();
-    std::make_tuple(std::move(move_source_trial.first));
-    std::make_tuple(std::move(move_source_trial.second));
+    (void)std::make_tuple(std::move(move_source_trial.first));
+    (void)std::make_tuple(std::move(move_source_trial.second));
     int tuple_move_cost = ::unnecessary_copy_tests::count_copies::moves;
     int tuple_copy_cost = ::unnecessary_copy_tests::count_copies::copies;