diff --git a/clang/unittests/Analysis/FlowSensitive/MockHeaders.cpp b/clang/unittests/Analysis/FlowSensitive/MockHeaders.cpp
index 2e528edd7c1f9..76c7310e16a4f 100644
--- a/clang/unittests/Analysis/FlowSensitive/MockHeaders.cpp
+++ b/clang/unittests/Analysis/FlowSensitive/MockHeaders.cpp
@@ -2232,6 +2232,95 @@ using testing::AssertionResult;
 #endif // TESTING_DEFS_H
 )cc";
 
+constexpr const char StdUniquePtrHeader[] = R"cc(
+namespace std {
+
+  template <typename T>
+  struct default_delete {};
+
+  template <typename T, typename D = default_delete<T>>
+  class unique_ptr {
+   public:
+    using element_type = T;
+    using deleter_type = D;
+
+    constexpr unique_ptr();
+    constexpr unique_ptr(nullptr_t) noexcept;
+    unique_ptr(unique_ptr&&);
+    explicit unique_ptr(T*);
+    template <typename U, typename E>
+    unique_ptr(unique_ptr<U, E>&&);
+
+    ~unique_ptr();
+
+    unique_ptr& operator=(unique_ptr&&);
+    template <typename U, typename E>
+    unique_ptr& operator=(unique_ptr<U, E>&&);
+    unique_ptr& operator=(nullptr_t);
+
+    void reset(T* = nullptr) noexcept;
+    T* release();
+    T* get() const;
+
+    T& operator*() const;
+    T* operator->() const;
+    explicit operator bool() const noexcept;
+  };
+
+  template <typename T, typename D>
+  class unique_ptr<T[], D> {
+   public:
+    T* get() const;
+    T& operator[](size_t i);
+    const T& operator[](size_t i) const;
+  };
+
+  template <typename T, typename... Args>
+  unique_ptr<T> make_unique(Args&&...);
+
+  template <class T, class D>
+  void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept;
+
+  template <class T1, class D1, class T2, class D2>
+  bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
+  template <class T1, class D1, class T2, class D2>
+  bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
+  template <class T1, class D1, class T2, class D2>
+  bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
+  template <class T1, class D1, class T2, class D2>
+  bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
+  template <class T1, class D1, class T2, class D2>
+  bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
+  template <class T1, class D1, class T2, class D2>
+  bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
+
+  template <class T, class D>
+  bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept;
+  template <class T, class D>
+  bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept;
+  template <class T, class D>
+  bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept;
+  template <class T, class D>
+  bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept;
+  template <class T, class D>
+  bool operator<(const unique_ptr<T, D>& x, nullptr_t);
+  template <class T, class D>
+  bool operator<(nullptr_t, const unique_ptr<T, D>& y);
+  template <class T, class D>
+  bool operator<=(const unique_ptr<T, D>& x, nullptr_t);
+  template <class T, class D>
+  bool operator<=(nullptr_t, const unique_ptr<T, D>& y);
+  template <class T, class D>
+  bool operator>(const unique_ptr<T, D>& x, nullptr_t);
+  template <class T, class D>
+  bool operator>(nullptr_t, const unique_ptr<T, D>& y);
+  template <class T, class D>
+  bool operator>=(const unique_ptr<T, D>& x, nullptr_t);
+  template <class T, class D>
+  bool operator>=(nullptr_t, const unique_ptr<T, D>& y);
+}
+)cc";
+
 std::vector<std::pair<std::string, std::string>> getMockHeaders() {
   std::vector<std::pair<std::string, std::string>> Headers;
   Headers.emplace_back("cstddef.h", CStdDefHeader);
@@ -2249,6 +2338,7 @@ std::vector<std::pair<std::string, std::string>> getMockHeaders() {
   Headers.emplace_back("statusor_defs.h", StatusOrDefsHeader);
   Headers.emplace_back("absl_log.h", AbslLogHeader);
   Headers.emplace_back("testing_defs.h", TestingDefsHeader);
+  Headers.emplace_back("std_unique_ptr.h", StdUniquePtrHeader);
   return Headers;
 }