diff --git a/headers/flat_hpp/flat_map.hpp b/headers/flat_hpp/flat_map.hpp
index 6bf2379..0931e0f 100644
--- a/headers/flat_hpp/flat_map.hpp
+++ b/headers/flat_hpp/flat_map.hpp
@@ -197,19 +197,27 @@ namespace flat_hpp
         const_reverse_iterator rend() const noexcept { return data_.rend(); }
         const_reverse_iterator crend() const noexcept { return data_.crend(); }
 
-        bool empty() const noexcept {
+        bool empty() const
+            noexcept(noexcept(std::declval<const container_type&>().empty()))
+        {
             return data_.empty();
         }
 
-        size_type size() const noexcept {
+        size_type size() const
+            noexcept(noexcept(std::declval<const container_type&>().size()))
+        {
             return data_.size();
         }
 
-        size_type max_size() const noexcept {
+        size_type max_size() const
+            noexcept(noexcept(std::declval<const container_type&>().max_size()))
+        {
             return data_.max_size();
         }
 
-        size_type capacity() const noexcept {
+        size_type capacity() const
+            noexcept(noexcept(std::declval<const container_type&>().capacity()))
+        {
             return data_.capacity();
         }
 
@@ -300,7 +308,9 @@ namespace flat_hpp
             return insert(hint, value_type(std::forward<Args>(args)...));
         }
 
-        void clear() noexcept {
+        void clear()
+            noexcept(noexcept(std::declval<container_type&>().clear()))
+        {
             data_.clear();
         }
 
diff --git a/headers/flat_hpp/flat_multimap.hpp b/headers/flat_hpp/flat_multimap.hpp
index b5131d3..a2342e7 100644
--- a/headers/flat_hpp/flat_multimap.hpp
+++ b/headers/flat_hpp/flat_multimap.hpp
@@ -197,19 +197,27 @@ namespace flat_hpp
         const_reverse_iterator rend() const noexcept { return data_.rend(); }
         const_reverse_iterator crend() const noexcept { return data_.crend(); }
 
-        bool empty() const noexcept {
+        bool empty() const
+            noexcept(noexcept(std::declval<const container_type&>().empty()))
+        {
             return data_.empty();
         }
 
-        size_type size() const noexcept {
+        size_type size() const
+            noexcept(noexcept(std::declval<const container_type&>().size()))
+        {
             return data_.size();
         }
 
-        size_type max_size() const noexcept {
+        size_type max_size() const
+            noexcept(noexcept(std::declval<const container_type&>().max_size()))
+        {
             return data_.max_size();
         }
 
-        size_type capacity() const noexcept {
+        size_type capacity() const
+            noexcept(noexcept(std::declval<const container_type&>().capacity()))
+        {
             return data_.capacity();
         }
 
@@ -296,7 +304,9 @@ namespace flat_hpp
             return insert(hint, value_type(std::forward<Args>(args)...));
         }
 
-        void clear() noexcept {
+        void clear()
+            noexcept(noexcept(std::declval<container_type&>().clear()))
+        {
             data_.clear();
         }
 
diff --git a/headers/flat_hpp/flat_multiset.hpp b/headers/flat_hpp/flat_multiset.hpp
index 128906f..15b2623 100644
--- a/headers/flat_hpp/flat_multiset.hpp
+++ b/headers/flat_hpp/flat_multiset.hpp
@@ -142,19 +142,27 @@ namespace flat_hpp
         const_reverse_iterator rend() const noexcept { return data_.rend(); }
         const_reverse_iterator crend() const noexcept { return data_.crend(); }
 
-        bool empty() const noexcept {
+        bool empty() const
+            noexcept(noexcept(std::declval<const container_type&>().empty()))
+        {
             return data_.empty();
         }
 
-        size_type size() const noexcept {
+        size_type size() const
+            noexcept(noexcept(std::declval<const container_type&>().size()))
+        {
             return data_.size();
         }
 
-        size_type max_size() const noexcept {
+        size_type max_size() const
+            noexcept(noexcept(std::declval<const container_type&>().max_size()))
+        {
             return data_.max_size();
         }
 
-        size_type capacity() const noexcept {
+        size_type capacity() const
+            noexcept(noexcept(std::declval<const container_type&>().capacity()))
+        {
             return data_.capacity();
         }
 
@@ -211,7 +219,9 @@ namespace flat_hpp
             return insert(hint, value_type(std::forward<Args>(args)...));
         }
 
-        void clear() noexcept {
+        void clear()
+            noexcept(noexcept(std::declval<container_type&>().clear()))
+        {
             data_.clear();
         }
 
diff --git a/headers/flat_hpp/flat_set.hpp b/headers/flat_hpp/flat_set.hpp
index 366e810..f2ee662 100644
--- a/headers/flat_hpp/flat_set.hpp
+++ b/headers/flat_hpp/flat_set.hpp
@@ -142,19 +142,27 @@ namespace flat_hpp
         const_reverse_iterator rend() const noexcept { return data_.rend(); }
         const_reverse_iterator crend() const noexcept { return data_.crend(); }
 
-        bool empty() const noexcept {
+        bool empty() const
+            noexcept(noexcept(std::declval<const container_type&>().empty()))
+        {
             return data_.empty();
         }
 
-        size_type size() const noexcept {
+        size_type size() const
+            noexcept(noexcept(std::declval<const container_type&>().size()))
+        {
             return data_.size();
         }
 
-        size_type max_size() const noexcept {
+        size_type max_size() const
+            noexcept(noexcept(std::declval<const container_type&>().max_size()))
+        {
             return data_.max_size();
         }
 
-        size_type capacity() const noexcept {
+        size_type capacity() const
+            noexcept(noexcept(std::declval<const container_type&>().capacity()))
+        {
             return data_.capacity();
         }
 
@@ -215,7 +223,9 @@ namespace flat_hpp
             return insert(hint, value_type(std::forward<Args>(args)...));
         }
 
-        void clear() noexcept {
+        void clear()
+            noexcept(noexcept(std::declval<container_type&>().clear()))
+        {
             data_.clear();
         }
 
diff --git a/untests/flat_map_tests.cpp b/untests/flat_map_tests.cpp
index 6d7a79e..5b2e958 100644
--- a/untests/flat_map_tests.cpp
+++ b/untests/flat_map_tests.cpp
@@ -74,6 +74,13 @@ TEST_CASE("flat_map") {
         STATIC_REQUIRE(std::is_nothrow_swappable_v<map_t>);
         STATIC_REQUIRE(std::is_nothrow_swappable_v<map2_t>);
         STATIC_REQUIRE(!std::is_nothrow_swappable_v<map3_t>);
+
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().empty()));
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().size()));
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().max_size()));
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().capacity()));
+
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().clear()));
     }
     SECTION("types") {
         using map_t = flat_map<int, unsigned>;
diff --git a/untests/flat_multimap_tests.cpp b/untests/flat_multimap_tests.cpp
index bc550f1..a6cd36b 100644
--- a/untests/flat_multimap_tests.cpp
+++ b/untests/flat_multimap_tests.cpp
@@ -74,6 +74,13 @@ TEST_CASE("flat_multimap") {
         STATIC_REQUIRE(std::is_nothrow_swappable_v<map_t>);
         STATIC_REQUIRE(std::is_nothrow_swappable_v<map2_t>);
         STATIC_REQUIRE(!std::is_nothrow_swappable_v<map3_t>);
+
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().empty()));
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().size()));
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().max_size()));
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().capacity()));
+
+        STATIC_REQUIRE(noexcept(std::declval<map_t&>().clear()));
     }
     SECTION("types") {
         using map_t = flat_multimap<int, unsigned>;
diff --git a/untests/flat_multiset_tests.cpp b/untests/flat_multiset_tests.cpp
index 014cb1a..748fe21 100644
--- a/untests/flat_multiset_tests.cpp
+++ b/untests/flat_multiset_tests.cpp
@@ -74,6 +74,13 @@ TEST_CASE("flat_multiset") {
         STATIC_REQUIRE(std::is_nothrow_swappable_v<set_t>);
         STATIC_REQUIRE(std::is_nothrow_swappable_v<set2_t>);
         STATIC_REQUIRE(!std::is_nothrow_swappable_v<set3_t>);
+
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().empty()));
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().size()));
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().max_size()));
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().capacity()));
+
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().clear()));
     }
     SECTION("types") {
         using set_t = flat_multiset<int>;
diff --git a/untests/flat_set_tests.cpp b/untests/flat_set_tests.cpp
index 40a04c4..f49cc14 100644
--- a/untests/flat_set_tests.cpp
+++ b/untests/flat_set_tests.cpp
@@ -74,6 +74,13 @@ TEST_CASE("flat_set") {
         STATIC_REQUIRE(std::is_nothrow_swappable_v<set_t>);
         STATIC_REQUIRE(std::is_nothrow_swappable_v<set2_t>);
         STATIC_REQUIRE(!std::is_nothrow_swappable_v<set3_t>);
+
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().empty()));
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().size()));
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().max_size()));
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().capacity()));
+
+        STATIC_REQUIRE(noexcept(std::declval<set_t&>().clear()));
     }
     SECTION("types") {
         using set_t = flat_set<int>;