diff --git a/piptools/scripts/compile.py b/piptools/scripts/compile.py
index 837bb0f23..35476ec4b 100755
--- a/piptools/scripts/compile.py
+++ b/piptools/scripts/compile.py
@@ -410,7 +410,7 @@ def cli(
         )
 
     if config:
-        log.info(f"Using pip-tools configuration defaults found in '{config !s}'.")
+        log.debug(f"Using pip-tools configuration defaults found in '{config !s}'.")
 
     if resolver_name == "legacy":
         log.warning(
diff --git a/piptools/scripts/sync.py b/piptools/scripts/sync.py
index d504d889a..63e4eb816 100755
--- a/piptools/scripts/sync.py
+++ b/piptools/scripts/sync.py
@@ -147,7 +147,7 @@ def cli(
             sys.exit(2)
 
     if config:
-        log.info(f"Using pip-tools configuration defaults found in '{config !s}'.")
+        log.debug(f"Using pip-tools configuration defaults found in '{config !s}'.")
 
     if python_executable:
         _validate_python_executable(python_executable)
diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 2650af2f6..df677d8d6 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -2925,3 +2925,15 @@ def test_compile_recursive_extras(runner, tmp_path, current_resolver):
 """
     assert out.exit_code == 0
     assert expected == out.stderr
+
+
+def test_config_option(pip_conf, runner, tmp_path, make_config_file):
+    config_file = make_config_file("dry-run", True)
+
+    req_in = tmp_path / "requirements.in"
+    req_in.touch()
+
+    out = runner.invoke(cli, [req_in.as_posix(), "--config", config_file.as_posix()])
+
+    assert out.exit_code == 0
+    assert "Dry-run, so nothing updated" in out.stderr
diff --git a/tests/test_cli_sync.py b/tests/test_cli_sync.py
index 78f5637d1..e7ec3c43f 100644
--- a/tests/test_cli_sync.py
+++ b/tests/test_cli_sync.py
@@ -372,3 +372,16 @@ def test_default_python_executable_option(run, runner):
             "-r",
         ]
     ]
+
+
+@mock.patch("piptools.sync.run")
+def test_config_option(run, runner, make_config_file):
+    config_file = make_config_file("dry-run", True)
+
+    with open(sync.DEFAULT_REQUIREMENTS_FILE, "w") as reqs_txt:
+        reqs_txt.write("six==1.10.0")
+
+    out = runner.invoke(cli, ["--config", config_file.as_posix()])
+
+    assert out.exit_code == 1
+    assert "Would install:" in out.stdout