diff --git a/libcxx/include/vector b/libcxx/include/vector
index 69babd04f7e6..52ddd45ffa86 100644
--- a/libcxx/include/vector
+++ b/libcxx/include/vector
@@ -144,7 +144,7 @@ public:
     public:
         reference(const reference&) noexcept;
         operator bool() const noexcept;
-        reference& operator=(const bool x) noexcept;
+        reference& operator=(bool x) noexcept;
         reference& operator=(const reference& x) noexcept;
         iterator operator&() const noexcept;
         void flip() noexcept;
diff --git a/libcxx/src/string.cpp b/libcxx/src/string.cpp
index 63b81d67049d..97a773f79a3b 100644
--- a/libcxx/src/string.cpp
+++ b/libcxx/src/string.cpp
@@ -423,7 +423,7 @@ get_swprintf()
 }
 
 template <typename S, typename V>
-S i_to_string(const V v)
+S i_to_string(V v)
 {
 //  numeric_limits::digits10 returns value less on 1 than desired for unsigned numbers.
 //  For example, for 1-byte unsigned value digits10 is 2 (999 can not be represented),
diff --git a/libcxx/test/std/containers/associative/map/map.cons/copy_assign.pass.cpp b/libcxx/test/std/containers/associative/map/map.cons/copy_assign.pass.cpp
index 50b44446d117..bcae4b462a3c 100644
--- a/libcxx/test/std/containers/associative/map/map.cons/copy_assign.pass.cpp
+++ b/libcxx/test/std/containers/associative/map/map.cons/copy_assign.pass.cpp
@@ -40,12 +40,12 @@ public:
     template <class U> bool operator==(const counting_allocatorT<U>& other) const noexcept { return foo == other.foo; }
     template <class U> bool operator!=(const counting_allocatorT<U>& other) const noexcept { return foo != other.foo; }
 
-    T * allocate(const size_t n) const {
+    T* allocate(size_t n) const {
         ca_allocs.push_back(foo);
         void * const pv = ::malloc(n * sizeof(T));
         return static_cast<T *>(pv);
     }
-    void deallocate(T * const p, size_t) const noexcept {
+    void deallocate(T* p, size_t) const noexcept {
         ca_deallocs.push_back(foo);
         free(p);
     }
@@ -63,12 +63,12 @@ public:
     template <class U> bool operator==(const counting_allocatorF<U>& other) const noexcept { return foo == other.foo; }
     template <class U> bool operator!=(const counting_allocatorF<U>& other) const noexcept { return foo != other.foo; }
 
-    T * allocate(const size_t n) const {
+    T* allocate(size_t n) const {
         ca_allocs.push_back(foo);
         void * const pv = ::malloc(n * sizeof(T));
         return static_cast<T *>(pv);
     }
-    void deallocate(T * const p, size_t) const noexcept {
+    void deallocate(T* p, size_t) const noexcept {
         ca_deallocs.push_back(foo);
         free(p);
     }
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp
index d2cf8d5d94f9..798c899e80f2 100644
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp
@@ -8,7 +8,7 @@
 
 // <string_view>
 
-// const size_type find_last_not_of(charT c, size_type pos = npos) const;
+// size_type find_last_not_of(charT c, size_type pos = npos) const;
 
 #include <string_view>
 #include <cassert>