diff --git a/manati/create.py b/manati/create.py
index 67e01a4..bdadc0b 100644
--- a/manati/create.py
+++ b/manati/create.py
@@ -32,7 +32,7 @@ def create_project(name, no_git, no_install, author, description, license):
 
     path = pathlib.Path.cwd() / name
     if os.path.exists(path):
-        raise Exception('ERROR: Path already exists.')
+        raise click.BadParameter('ERROR: Path already exists.')
 
     templates = pathlib.Path(__file__).parent / 'templates'
     subs = {
diff --git a/manati/manati.py b/manati/manati.py
index 9fae3b4..38bcb13 100644
--- a/manati/manati.py
+++ b/manati/manati.py
@@ -47,10 +47,8 @@ def create_project_command(name, no_git, no_install, author, description, licens
     By default, the project is also pip-installed for development
     in editable mode, and a local git repository is also created.
     """
-    try:
-        create_project(name, no_git, no_install, author, description, license)
-    except Exception as e:
-        click.echo(e)
+
+    create_project(name, no_git, no_install, author, description, license)
 
 
 @cli.group('deploy')
diff --git a/tests/test_create.py b/tests/test_create.py
index 1494cbd..0042921 100644
--- a/tests/test_create.py
+++ b/tests/test_create.py
@@ -1,4 +1,5 @@
 import unittest
+import os
 from os.path import exists
 import pathlib
 
@@ -24,3 +25,10 @@ def test_create_project(self):
             assert exists(path / 'docs' / 'conf.py')
             assert exists(path / 'docs' / '_build' / 'html' / 'index.html')
 
+    def test_create_project_do_not_overwrite(self):
+        runner = CliRunner()
+        with runner.isolated_filesystem():
+            os.mkdir('tee')
+            with self.assertRaises(Exception):
+                result = runner.invoke(cli, ['create', '-n' , 'tee'], input='\n\n\n')
+
diff --git a/tests/test_run.py b/tests/test_run.py
index 671466a..329d148 100644
--- a/tests/test_run.py
+++ b/tests/test_run.py
@@ -50,3 +50,21 @@ def test_run_docs(self, mock_launch):
             result = runner.invoke(cli, ['run', 'docs'])
             assert result.exit_code == 0
             assert os.path.exists(Path.cwd() / 'docs' / '_build' / 'html' / 'index.html')
+
+    @unittest.mock.patch('manati.manati.find_project_data')
+    def test_run_flake8_guess(self, mock_fpd):
+        runner = CliRunner()
+        mock_fpd.return_value = {'package': 'test_project'}
+        with runner.isolated_filesystem():
+            create_project_structure('test_project', Path('test_project'), {'PROJECT_NAME': 'test_project',
+                                                                            'MODULE_NAME': 'test_project'})
+            result = runner.invoke(cli, ['run', 'flake8'], input='\n')
+            assert result.exit_code == 0
+
+    def test_run_flake8(self):
+        runner = CliRunner()
+        with runner.isolated_filesystem():
+            create_project_structure('test_project', Path('test_project'), {'PROJECT_NAME': 'test_project',
+                                                                            'MODULE_NAME': 'test_project'})
+            result = runner.invoke(cli, ['run', 'flake8', 'test_project'])
+            assert result.exit_code == 0
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..6929e7c
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,35 @@
+import unittest
+import unittest.mock
+from pathlib import Path
+import shutil
+import os
+import subprocess
+
+from click.testing import CliRunner
+
+from manati.utils import find_project_data, task
+
+
+class TestUtils(unittest.TestCase):
+
+    @unittest.mock.patch('manati.utils.shell')
+    @unittest.mock.patch('manati.utils.os.environ.get')
+    def test_find_project_data_author_from_env(self, mock_env, mock_shell):
+        mock_shell.return_value = subprocess.run('blabla1234', shell=True)
+
+        runner = CliRunner()
+        with runner.isolated_filesystem():
+            mock_env.return_value = 'test_user'
+            info = find_project_data()
+            assert info.get('author') == 'test_user'
+
+    @unittest.mock.patch('manati.utils.click.secho')
+    def test_task(self, mock_secho):
+
+        @task('Before', 'After')
+        def func():
+            raise Exception
+
+        with self.assertRaises(Exception):
+            func()
+            mock_secho.assert_called_with('ERROR')