diff --git a/flang/test/Driver/flarge_sizes.f90 b/flang/test/Driver/flarge-sizes.f90 similarity index 100% rename from flang/test/Driver/flarge_sizes.f90 rename to flang/test/Driver/flarge-sizes.f90 diff --git a/flang/test/Driver/intrinsic_module_path.f90 b/flang/test/Driver/intrinsic-module-path.f90 similarity index 100% rename from flang/test/Driver/intrinsic_module_path.f90 rename to flang/test/Driver/intrinsic-module-path.f90 diff --git a/flang/test/Driver/std2018_wrong.f90 b/flang/test/Driver/std2018-wrong.f90 similarity index 100% rename from flang/test/Driver/std2018_wrong.f90 rename to flang/test/Driver/std2018-wrong.f90 diff --git a/flang/test/Driver/werror_parse.f b/flang/test/Driver/werror-parse.f similarity index 100% rename from flang/test/Driver/werror_parse.f rename to flang/test/Driver/werror-parse.f diff --git a/flang/test/Driver/werror_scan.f b/flang/test/Driver/werror-scan.f similarity index 100% rename from flang/test/Driver/werror_scan.f rename to flang/test/Driver/werror-scan.f diff --git a/flang/test/Driver/werror_sema.f90 b/flang/test/Driver/werror-sema.f90 similarity index 100% rename from flang/test/Driver/werror_sema.f90 rename to flang/test/Driver/werror-sema.f90 diff --git a/flang/test/Driver/werror_wrong.f90 b/flang/test/Driver/werror-wrong.f90 similarity index 100% rename from flang/test/Driver/werror_wrong.f90 rename to flang/test/Driver/werror-wrong.f90