diff --git a/.clang-format b/.clang-format
new file mode 100644
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,8 @@
+BasedOnStyle: LLVM
+IndentWidth: 8
+UseTab: ForIndentation
+BreakBeforeBraces: Linux
+AllowShortIfStatementsOnASingleLine: false
+IndentCaseLabels: false
+AllowShortBlocksOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
diff --git a/tests/test-check-code.t b/tests/test-check-code.t
--- a/tests/test-check-code.t
+++ b/tests/test-check-code.t
@@ -39,6 +39,7 @@
 
   $ testrepohg files 'glob:*'
   .arcconfig
+  .clang-format
   .editorconfig
   .hgignore
   .hgsigs