diff --git a/Fortran/UnitTests/fcvs21_f95/lit.local.cfg b/Fortran/UnitTests/fcvs21_f95/lit.local.cfg
--- a/Fortran/UnitTests/fcvs21_f95/lit.local.cfg
+++ b/Fortran/UnitTests/fcvs21_f95/lit.local.cfg
@@ -1,2 +1,8 @@
 config.traditional_output = True
 config.single_source = True
+
+# Flang uses NO_STOP_MESSAGE to control the output of the STOP statement. If
+# it is present in the environment, we should forward it to the tests, otherwise
+# they might choke on warnings about signaling INEXACT exceptions.
+if 'NO_STOP_MESSAGE' in os.environ:
+  config.environment['NO_STOP_MESSAGE'] = os.environ['NO_STOP_MESSAGE']