diff --git a/cpp/src/arrow/flight/sql/CMakeLists.txt b/cpp/src/arrow/flight/sql/CMakeLists.txt
index db9e855890f52..e39306fe1202d 100644
--- a/cpp/src/arrow/flight/sql/CMakeLists.txt
+++ b/cpp/src/arrow/flight/sql/CMakeLists.txt
@@ -95,9 +95,8 @@ if(ARROW_BUILD_TESTS OR ARROW_BUILD_EXAMPLES)
       example/sqlite_server.cc
       example/sqlite_tables_schema_batch_reader.cc)
 
-  set(ARROW_FLIGHT_SQL_TEST_SRCS
-      server_test.cc
-      server_session_middleware_internals_test.cc)
+  set(ARROW_FLIGHT_SQL_TEST_SRCS server_test.cc
+                                 server_session_middleware_internals_test.cc)
 
   set(ARROW_FLIGHT_SQL_TEST_LIBS ${SQLite3_LIBRARIES})
   set(ARROW_FLIGHT_SQL_ACERO_SRCS example/acero_server.cc)