diff --git a/pytest_client_tools/insights_client.py b/pytest_client_tools/insights_client.py
index 977204d..74f1fd8 100644
--- a/pytest_client_tools/insights_client.py
+++ b/pytest_client_tools/insights_client.py
@@ -112,6 +112,10 @@ def reload(self):
             with contextlib.suppress(configparser.DuplicateSectionError):
                 self._config.add_section("insights-client")
 
+    def save(self):
+        with open(self._path, "w") as f:
+            self._config.write(f, space_around_delimiters=False)
+
     def __getattr__(self, name):
         if name in self._KEYS_BOOL:
             read_func = self._config.getboolean
diff --git a/tests/test_insights_client.py b/tests/test_insights_client.py
index 1481631..1ee198d 100644
--- a/tests/test_insights_client.py
+++ b/tests/test_insights_client.py
@@ -83,6 +83,12 @@ def test_config_set_keys(tmp_path):
     # unknown key; setting will set a class attribute, not a config value
     conf.unknown = "see"
     assert conf.unknown == "see"
+    # save and check the result
+    conf.save()
+    conf_file_text = conf_file.read_text()
+    assert "cmd_timeout=60" in conf_file_text
+    assert "loglevel=DEBUG" in conf_file_text
+    assert "see" not in conf_file_text
 
 
 def test_config_reload(tmp_path):