diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -2388,8 +2388,8 @@
   //        Also check whether this is used for setting library search paths.
   ToolChain::AddClangCXXStdlibIncludeArgs(DriverArgs, CC1Args);
 
-  if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
-      DriverArgs.hasArg(options::OPT_nostdincxx))
+  if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
+                        options::OPT_nostdincxx))
     return;
 
   llvm::SmallString<128> Sysroot = GetEffectiveSysroot(DriverArgs);
diff --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp b/clang/lib/Driver/ToolChains/Fuchsia.cpp
--- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -377,8 +377,8 @@
 
 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
                                            ArgStringList &CC1Args) const {
-  if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
-      DriverArgs.hasArg(options::OPT_nostdincxx))
+  if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
+                        options::OPT_nostdincxx))
     return;
 
   const Driver &D = getDriver();
diff --git a/clang/lib/Driver/ToolChains/MinGW.cpp b/clang/lib/Driver/ToolChains/MinGW.cpp
--- a/clang/lib/Driver/ToolChains/MinGW.cpp
+++ b/clang/lib/Driver/ToolChains/MinGW.cpp
@@ -644,8 +644,8 @@
 
 void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
     const ArgList &DriverArgs, ArgStringList &CC1Args) const {
-  if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
-      DriverArgs.hasArg(options::OPT_nostdincxx))
+  if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
+                        options::OPT_nostdincxx))
     return;
 
   StringRef Slash = llvm::sys::path::get_separator();
diff --git a/clang/lib/Driver/ToolChains/WebAssembly.cpp b/clang/lib/Driver/ToolChains/WebAssembly.cpp
--- a/clang/lib/Driver/ToolChains/WebAssembly.cpp
+++ b/clang/lib/Driver/ToolChains/WebAssembly.cpp
@@ -424,8 +424,8 @@
 void WebAssembly::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
                                                ArgStringList &CC1Args) const {
 
-  if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
-      DriverArgs.hasArg(options::OPT_nostdincxx))
+  if (DriverArgs.hasArg(options::OPT_nostdlibinc, options::OPT_nostdinc,
+                        options::OPT_nostdincxx))
     return;
 
   switch (GetCXXStdlibType(DriverArgs)) {
diff --git a/clang/test/Driver/darwin-header-search-libcxx.cpp b/clang/test/Driver/darwin-header-search-libcxx.cpp
--- a/clang/test/Driver/darwin-header-search-libcxx.cpp
+++ b/clang/test/Driver/darwin-header-search-libcxx.cpp
@@ -92,39 +92,22 @@
 // CHECK-LIBCXX-SYSROOT_AND_TOOLCHAIN-1: "-internal-isystem" "[[TOOLCHAIN]]/usr/bin/../include/c++/v1"
 // CHECK-LIBCXX-SYSROOT_AND_TOOLCHAIN-1-NOT: "-internal-isystem" "[[SYSROOT]]/usr/include/c++/v1"
 
-// Make sure that using -nostdinc does not drop any C++ library include path.
-// This behavior is strange, but it is compatible with the legacy CC1 behavior.
-//
-// RUN: %clang -### %s -fsyntax-only 2>&1 \
-// RUN:     --target=x86_64-apple-darwin16 \
-// RUN:     -ccc-install-dir %S/Inputs/basic_darwin_toolchain/usr/bin \
-// RUN:     -resource-dir=%S/Inputs/resource_dir \
-// RUN:     -isysroot %S/Inputs/basic_darwin_sdk_usr_cxx_v1 \
-// RUN:     -stdlib=platform \
-// RUN:     -nostdinc \
-// RUN:   | FileCheck -DSYSROOT=%S/Inputs/basic_darwin_sdk_usr_cxx_v1 \
-// RUN:               -DTOOLCHAIN=%S/Inputs/basic_darwin_toolchain \
-// RUN:               --check-prefix=CHECK-LIBCXX-NOSTDINC-1 %s
-// CHECK-LIBCXX-NOSTDINC-1: "-cc1"
-// CHECK-LIBCXX-NOSTDINC-1-NOT: "-internal-isystem" "[[SYSROOT]]/usr/include/c++/v1"
-// CHECK-LIBCXX-NOSTDINC-1: "-internal-isystem" "[[TOOLCHAIN]]/usr/bin/../include/c++/v1"
+// Make sure that using -nostdinc, -nostdinc++ or -nostdlib will drop both the toolchain
+// C++ include path and the sysroot one.
 //
 // RUN: %clang -### %s -fsyntax-only 2>&1 \
 // RUN:     --target=x86_64-apple-darwin16 \
 // RUN:     -ccc-install-dir %S/Inputs/basic_darwin_toolchain/usr/bin \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
-// RUN:     -isysroot %S/Inputs/basic_darwin_sdk_no_libcxx \
+// RUN:     -isysroot %S/Inputs/basic_darwin_sdk_usr \
 // RUN:     -stdlib=platform \
 // RUN:     -nostdinc \
-// RUN:   | FileCheck -DSYSROOT=%S/Inputs/basic_darwin_sdk_no_libcxx \
+// RUN:   | FileCheck -DSYSROOT=%S/Inputs/basic_darwin_sdk_usr \
 // RUN:               -DTOOLCHAIN=%S/Inputs/basic_darwin_toolchain \
-// RUN:               --check-prefix=CHECK-LIBCXX-NOSTDINC-2 %s
-// CHECK-LIBCXX-NOSTDINC-2: "-cc1"
-// CHECK-LIBCXX-NOSTDINC-2: "-internal-isystem" "[[TOOLCHAIN]]/usr/bin/../include/c++/v1"
-// CHECK-LIBCXX-NOSTDINC-2-NOT: "-internal-isystem" "[[SYSROOT]]/usr/include/c++/v1"
-
-// Make sure that using -nostdinc++ or -nostdlib will drop both the toolchain
-// C++ include path and the sysroot one.
+// RUN:               --check-prefix=CHECK-LIBCXX-NOSTDLIBINC %s
+// CHECK-LIBCXX-NOSTDINC: "-cc1"
+// CHECK-LIBCXX-NOSTDINC-NOT: "-internal-isystem" "[[TOOLCHAIN]]/usr/bin/../include/c++/v1"
+// CHECK-LIBCXX-NOSTDINC-NOT: "-internal-isystem" "[[SYSROOT]]/usr/include/c++/v1"
 //
 // RUN: %clang -### %s -fsyntax-only 2>&1 \
 // RUN:     --target=x86_64-apple-darwin16 \
diff --git a/clang/test/Driver/nostdincxx.cpp b/clang/test/Driver/nostdincxx.cpp
--- a/clang/test/Driver/nostdincxx.cpp
+++ b/clang/test/Driver/nostdincxx.cpp
@@ -2,8 +2,8 @@
 // RUN: not %clangxx -nostdinc++ %s 2>&1 | FileCheck %s
 // RUN: not %clangxx -nostdlibinc %s 2>&1 | FileCheck %s
 // RUN: not %clangxx --target=x86_64-unknown-unknown-gnu -fsyntax-only -nostdinc -nostdinc++ %s 2>&1 | FileCheck /dev/null --implicit-check-not=-Wunused-command-line-argument
-// CHECK: file not found
-#include <vector> 
+// CHECK: 'vector' file not found
+#include <vector>
 
 // MSVC, PS4, PS5 have C++ headers in the same directory as C headers.
 // UNSUPPORTED: ms-sdk, ps4, ps5