diff --git a/mlir/test/lib/Dialect/Tosa/TestAvailability.cpp b/mlir/test/lib/Dialect/Tosa/TestAvailability.cpp
index bec563d1ec747..9bd13a4518457 100644
--- a/mlir/test/lib/Dialect/Tosa/TestAvailability.cpp
+++ b/mlir/test/lib/Dialect/Tosa/TestAvailability.cpp
@@ -26,9 +26,12 @@ struct PrintOpAvailability
   StringRef getArgument() const final { return "test-tosa-op-availability"; }
   StringRef getDescription() const final { return "Test Tosa op availability"; }
 };
+static llvm::sys::SmartRWMutex<true> PrintMutex;
 } // namespace
 
 void PrintOpAvailability::runOnOperation() {
+  llvm::sys::SmartScopedWriter<true> lock(PrintMutex);
+
   auto f = getOperation();
   llvm::outs() << f.getName() << "\n";