diff --git a/cwltool/argparser.py b/cwltool/argparser.py
index 332f18d86..90629d5a1 100644
--- a/cwltool/argparser.py
+++ b/cwltool/argparser.py
@@ -385,6 +385,7 @@ def arg_parser() -> argparse.ArgumentParser:
 
     volumegroup = parser.add_mutually_exclusive_group()
     volumegroup.add_argument("--verbose", action="store_true", help="Default logging")
+    volumegroup.add_argument("--no-warnings", action="store_true", help="Only print errors.")
     volumegroup.add_argument("--quiet", action="store_true", help="Only print warnings and errors.")
     volumegroup.add_argument("--debug", action="store_true", help="Print even more logging")
 
diff --git a/cwltool/cwlprov/ro.py b/cwltool/cwlprov/ro.py
index f2bb9cf74..87c060cdc 100644
--- a/cwltool/cwlprov/ro.py
+++ b/cwltool/cwlprov/ro.py
@@ -5,7 +5,6 @@
 import os
 import shutil
 import tempfile
-import traceback
 import uuid
 from pathlib import Path, PurePosixPath
 from typing import (
diff --git a/cwltool/loghandler.py b/cwltool/loghandler.py
index c1f451991..7ef71206c 100644
--- a/cwltool/loghandler.py
+++ b/cwltool/loghandler.py
@@ -11,6 +11,7 @@
 
 def configure_logging(
     stderr_handler: logging.Handler,
+    no_warnings: bool,
     quiet: bool,
     debug: bool,
     enable_color: bool,
@@ -21,6 +22,8 @@ def configure_logging(
     rdflib_logger = logging.getLogger("rdflib.term")
     rdflib_logger.addHandler(stderr_handler)
     rdflib_logger.setLevel(logging.ERROR)
+    if no_warnings:
+        stderr_handler.setLevel(logging.ERROR)
     if quiet:
         # Silence STDERR, not an eventual provenance log file
         stderr_handler.setLevel(logging.WARN)
diff --git a/cwltool/main.py b/cwltool/main.py
index 2ae9f9f6a..4d536a679 100755
--- a/cwltool/main.py
+++ b/cwltool/main.py
@@ -8,7 +8,6 @@
 import io
 import logging
 import os
-import shutil
 import signal
 import subprocess  # nosec
 import sys
diff --git a/tests/test_js_sandbox.py b/tests/test_js_sandbox.py
index 9739c77a7..98b4cc115 100644
--- a/tests/test_js_sandbox.py
+++ b/tests/test_js_sandbox.py
@@ -22,7 +22,7 @@
     ("v7.7.3\n", True),
 ]
 
-configure_logging(_logger.handlers[-1], False, True, True, True)
+configure_logging(_logger.handlers[-1], False, False, True, True, True)
 _logger.setLevel(logging.DEBUG)
 
 
diff --git a/tests/test_load_tool.py b/tests/test_load_tool.py
index 3d0cba161..f291d2985 100644
--- a/tests/test_load_tool.py
+++ b/tests/test_load_tool.py
@@ -15,7 +15,7 @@
 
 from .util import get_data
 
-configure_logging(_logger.handlers[-1], False, True, True, True)
+configure_logging(_logger.handlers[-1], False, False, True, True, True)
 _logger.setLevel(logging.DEBUG)