diff --git a/dbt2looker/cli.py b/dbt2looker/cli.py
index a7c0ee4..ad8e294 100644
--- a/dbt2looker/cli.py
+++ b/dbt2looker/cli.py
@@ -98,20 +98,23 @@ def run():
         type=str,
     )
     args = argparser.parse_args()
+    run_convert(args.target_dir, args.project_dir, args.output_dir, args.tag, args.log_level)
+
+def run_convert(target_dir='./target', project_dir='./', output_dir=DEFAULT_LOOKML_OUTPUT_DIR, tag=None, log_level='INFO'):
     logging.basicConfig(
-        level=getattr(logging, args.log_level),
+        level=getattr(logging, log_level),
         format='%(asctime)s %(levelname)-6s %(message)s',
         datefmt='%H:%M:%S',
     )
 
     # Load raw manifest file
-    raw_manifest = get_manifest(prefix=args.target_dir)
-    raw_catalog = get_catalog(prefix=args.target_dir)
-    raw_config = get_dbt_project_config(prefix=args.project_dir)
+    raw_manifest = get_manifest(prefix=target_dir)
+    raw_catalog = get_catalog(prefix=target_dir)
+    raw_config = get_dbt_project_config(prefix=project_dir)
 
-    # Get dbt models from manifest
+    # Get dbt models from manifestpo
     dbt_project_config = parser.parse_dbt_project_config(raw_config)
-    typed_dbt_models = parser.parse_typed_models(raw_manifest, raw_catalog, tag=args.tag)
+    typed_dbt_models = parser.parse_typed_models(raw_manifest, raw_catalog, tag=tag)
     adapter_type = parser.parse_adapter_type(raw_manifest)
 
     # Generate lookml views
@@ -119,12 +122,12 @@ def run():
         generator.lookml_view_from_dbt_model(model, adapter_type)
         for model in typed_dbt_models
     ]
-    pathlib.Path(os.path.join(args.output_dir, 'views')).mkdir(parents=True, exist_ok=True)
+    pathlib.Path(os.path.join(output_dir, 'views')).mkdir(parents=True, exist_ok=True)
     for view in lookml_views:
-        with open(os.path.join(args.output_dir, 'views', view.filename), 'w') as f:
+        with open(os.path.join(output_dir, 'views', view.filename), 'w') as f:
             f.write(view.contents)
 
-    logging.info(f'Generated {len(lookml_views)} lookml views in {os.path.join(args.output_dir, "views")}')
+    logging.info(f'Generated {len(lookml_views)} lookml views in {os.path.join(output_dir, "views")}')
 
     # Generate Lookml models
     lookml_models = [
@@ -132,7 +135,8 @@ def run():
         for model in typed_dbt_models
     ]
     for model in lookml_models:
-        with open(os.path.join(args.output_dir, model.filename), 'w') as f:
+        with open(os.path.join(output_dir, model.filename), 'w') as f:
             f.write(model.contents)
-    logging.info(f'Generated {len(lookml_models)} lookml models in {args.output_dir}')
+    logging.info(f'Generated {len(lookml_models)} lookml models in {output_dir}')
     logging.info('Success')
+