diff --git a/clang-tools-extra/clang-tidy/add_new_check.py b/clang-tools-extra/clang-tidy/add_new_check.py
--- a/clang-tools-extra/clang-tidy/add_new_check.py
+++ b/clang-tools-extra/clang-tidy/add_new_check.py
@@ -138,9 +138,9 @@
   if (!MatchedDecl->getIdentifier() || MatchedDecl->getName().startswith("awesome_"))
     return;
   diag(MatchedDecl->getLocation(), "function %%0 is insufficiently awesome")
-      << MatchedDecl;
-  diag(MatchedDecl->getLocation(), "insert 'awesome'", DiagnosticIDs::Note)
+      << MatchedDecl
       << FixItHint::CreateInsertion(MatchedDecl->getLocation(), "awesome_");
+  diag(MatchedDecl->getLocation(), "insert 'awesome'", DiagnosticIDs::Note);
 }
 
 } // namespace clang::tidy::%(namespace)s
@@ -275,7 +275,7 @@
     module, check_name + '.' + test_extension))
   print('Creating %s...' % filename)
   with io.open(filename, 'w', encoding='utf8', newline='\n') as f:
-    f.write("""// RUN: %%check_clang_tidy %%s %(check_name_dashes)s %%t
+    f.write("""// RUN: %%check_clang_tidy %%s %(check_name_dashes)s %%t --
 
 // FIXME: Add something that triggers the check here.
 void f();
@@ -293,7 +293,7 @@
 
 
 def get_actual_filename(dirname, filename):
-  if not os.path.isdir(dirname): 
+  if not os.path.isdir(dirname):
     return ''
   name = os.path.join(dirname, filename)
   if (os.path.isfile(name)):
diff --git a/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp b/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp
--- a/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp
@@ -18,6 +18,7 @@
 #include "BranchCloneCheck.h"
 #include "CopyConstructorInitCheck.h"
 #include "DanglingHandleCheck.h"
+#include "DupaCheck.h"
 #include "DynamicStaticInitializersCheck.h"
 #include "EasilySwappableParametersCheck.h"
 #include "ExceptionEscapeCheck.h"
@@ -98,6 +99,8 @@
         "bugprone-copy-constructor-init");
     CheckFactories.registerCheck<DanglingHandleCheck>(
         "bugprone-dangling-handle");
+    CheckFactories.registerCheck<DupaCheck>(
+        "bugprone-dupa");
     CheckFactories.registerCheck<DynamicStaticInitializersCheck>(
         "bugprone-dynamic-static-initializers");
     CheckFactories.registerCheck<EasilySwappableParametersCheck>(