diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -14429,13 +14429,10 @@
   CXXRecordDecl *RD = CopyOp->getParent();
   CXXMethodDecl *UserDeclaredOperation = nullptr;
 
-  // In Microsoft mode, assignment operations don't affect constructors and
-  // vice versa.
   if (RD->hasUserDeclaredDestructor()) {
     UserDeclaredOperation = RD->getDestructor();
   } else if (!isa<CXXConstructorDecl>(CopyOp) &&
-             RD->hasUserDeclaredCopyConstructor() &&
-             !S.getLangOpts().MSVCCompat) {
+             RD->hasUserDeclaredCopyConstructor()) {
     // Find any user-declared copy constructor.
     for (auto *I : RD->ctors()) {
       if (I->isCopyConstructor()) {
@@ -14445,8 +14442,7 @@
     }
     assert(UserDeclaredOperation);
   } else if (isa<CXXConstructorDecl>(CopyOp) &&
-             RD->hasUserDeclaredCopyAssignment() &&
-             !S.getLangOpts().MSVCCompat) {
+             RD->hasUserDeclaredCopyAssignment()) {
     // Find any user-declared move assignment operator.
     for (auto *I : RD->methods()) {
       if (I->isCopyAssignmentOperator()) {
diff --git a/clang/test/SemaCXX/deprecated-copy-with-dtor.cpp b/clang/test/SemaCXX/deprecated-copy-with-dtor.cpp
--- a/clang/test/SemaCXX/deprecated-copy-with-dtor.cpp
+++ b/clang/test/SemaCXX/deprecated-copy-with-dtor.cpp
@@ -1,6 +1,9 @@
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify -fms-compatibility
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-dtor -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-dtor -verify -fms-compatibility
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-with-dtor -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-with-dtor -verify -fms-compatibility
 
 class A {
 public:
diff --git a/clang/test/SemaCXX/deprecated-copy-with-user-provided-copy.cpp b/clang/test/SemaCXX/deprecated-copy-with-user-provided-copy.cpp
--- a/clang/test/SemaCXX/deprecated-copy-with-user-provided-copy.cpp
+++ b/clang/test/SemaCXX/deprecated-copy-with-user-provided-copy.cpp
@@ -1,5 +1,7 @@
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify -fms-compatibility
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-with-user-provided-copy -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-with-user-provided-copy -verify -fms-compatibility
 
 struct A {
   A &operator=(const A &); // expected-warning {{definition of implicit copy constructor for 'A' is deprecated because it has a user-provided copy assignment operator}}
diff --git a/clang/test/SemaCXX/deprecated-copy-with-user-provided-dtor.cpp b/clang/test/SemaCXX/deprecated-copy-with-user-provided-dtor.cpp
--- a/clang/test/SemaCXX/deprecated-copy-with-user-provided-dtor.cpp
+++ b/clang/test/SemaCXX/deprecated-copy-with-user-provided-dtor.cpp
@@ -1,5 +1,7 @@
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify -fms-compatibility
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-with-user-provided-dtor -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy-with-user-provided-dtor -verify -fms-compatibility
 
 struct A {
   ~A(); // expected-warning {{definition of implicit copy constructor for 'A' is deprecated because it has a user-provided destructor}}
diff --git a/clang/test/SemaCXX/deprecated-copy.cpp b/clang/test/SemaCXX/deprecated-copy.cpp
--- a/clang/test/SemaCXX/deprecated-copy.cpp
+++ b/clang/test/SemaCXX/deprecated-copy.cpp
@@ -1,5 +1,7 @@
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated -verify -fms-compatibility
 // RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy -verify
+// RUN: %clang_cc1 -std=c++11 %s -Wdeprecated-copy -verify -fms-compatibility
 
 struct A {
     A& operator=(const A&) = default; // expected-warning {{definition of implicit copy constructor for 'A' is deprecated because it has a user-declared copy assignment operator}}
diff --git a/clang/test/SemaCXX/deprecated.cpp b/clang/test/SemaCXX/deprecated.cpp
--- a/clang/test/SemaCXX/deprecated.cpp
+++ b/clang/test/SemaCXX/deprecated.cpp
@@ -1,10 +1,16 @@
 // RUN: %clang_cc1 -std=c++98 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu
+// RUN: %clang_cc1 -std=c++98 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu -fms-compatibility
 // RUN: %clang_cc1 -std=c++11 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu
+// RUN: %clang_cc1 -std=c++11 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu -fms-compatibility
 // RUN: %clang_cc1 -std=c++14 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu
+// RUN: %clang_cc1 -std=c++14 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu -fms-compatibility
 // RUN: %clang_cc1 -std=c++17 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu
+// RUN: %clang_cc1 -std=c++17 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu -fms-compatibility
 // RUN: %clang_cc1 -std=c++2a %s -Wno-parentheses -Wdeprecated -verify=expected,cxx20 -triple x86_64-linux-gnu
+// RUN: %clang_cc1 -std=c++2a %s -Wno-parentheses -Wdeprecated -verify=expected,cxx20 -triple x86_64-linux-gnu -fms-compatibility
 
 // RUN: %clang_cc1 -std=c++14 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu -Wno-deprecated-register -DNO_DEPRECATED_FLAGS
+// RUN: %clang_cc1 -std=c++14 %s -Wno-parentheses -Wdeprecated -verify=expected,not-cxx20 -triple x86_64-linux-gnu -Wno-deprecated-register -DNO_DEPRECATED_FLAGS -fms-compatibility
 
 #include "Inputs/register.h"