diff --git a/clang/test/Format/adjust-indent.cpp b/clang/test/Format/adjust-indent.cpp
--- a/clang/test/Format/adjust-indent.cpp
+++ b/clang/test/Format/adjust-indent.cpp
@@ -1,4 +1,4 @@
-// RUN: grep -Ev "// *[A-Z-]+:" %s | clang-format -lines=2:2 \
+// RUN: grep -Ev "// *[A-Z-]+:" %s | clang-format -style=LLVM -lines=2:2 \
 // RUN:   | FileCheck -strict-whitespace %s
 
 void  f() {
diff --git a/clang/test/Format/disable-include-sorting.cpp b/clang/test/Format/disable-include-sorting.cpp
--- a/clang/test/Format/disable-include-sorting.cpp
+++ b/clang/test/Format/disable-include-sorting.cpp
@@ -1,4 +1,4 @@
-// RUN: clang-format %s | FileCheck %s
+// RUN: clang-format %s -style=LLVM | FileCheck %s
 // RUN: clang-format %s -sort-includes -style="{SortIncludes: false}" | FileCheck %s
 // RUN: clang-format %s -sort-includes=false | FileCheck %s -check-prefix=NOT-SORTED
 
diff --git a/clang/test/Format/language-detection.cpp b/clang/test/Format/language-detection.cpp
--- a/clang/test/Format/language-detection.cpp
+++ b/clang/test/Format/language-detection.cpp
@@ -1,8 +1,8 @@
 // RUN: grep -Ev "// *[A-Z0-9_]+:" %s \
-// RUN:   | clang-format -style=llvm -assume-filename=foo.js \
+// RUN:   | clang-format -style=LLVM -assume-filename=foo.js \
 // RUN:   | FileCheck -strict-whitespace -check-prefix=CHECK1 %s
 // RUN: grep -Ev "// *[A-Z0-9_]+:" %s \
-// RUN:   | clang-format -style=llvm -assume-filename=foo.cpp \
+// RUN:   | clang-format -style=LLVM -assume-filename=foo.cpp \
 // RUN:   | FileCheck -strict-whitespace -check-prefix=CHECK2 %s
 // CHECK1: {{^a >>>= b;$}}
 // CHECK2: {{^a >> >= b;$}}
diff --git a/clang/test/Format/xmloutput.cpp b/clang/test/Format/xmloutput.cpp
--- a/clang/test/Format/xmloutput.cpp
+++ b/clang/test/Format/xmloutput.cpp
@@ -1,4 +1,4 @@
-// RUN: clang-format -output-replacements-xml -sort-includes %s \
+// RUN: clang-format -style=LLVM -output-replacements-xml -sort-includes %s \
 // RUN:   | FileCheck -strict-whitespace %s
 
 // CHECK: <?xml