diff --git a/.gitignore b/.gitignore
index c84498f..9a741a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,6 @@ __pycache__
 node_modules
 build/
 update.sh
+
+.idea/
+.vscode/
diff --git a/axe_selenium_python/axe.py b/axe_selenium_python/axe.py
index 9ec5616..b044f4d 100755
--- a/axe_selenium_python/axe.py
+++ b/axe_selenium_python/axe.py
@@ -105,7 +105,7 @@ def write_results(self, data, name=None):
         if name:
             filepath = os.path.abspath(name)
         else:
-            filepath = os.path.join(os.path.getcwd(), "results.json")
+            filepath = os.path.abspath("results.json")
 
         with open(filepath, "w", encoding="utf8") as f:
             try:
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..1ceda4d
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,4 @@
+# pytest.ini
+[pytest]
+markers =
+    nondestructive: mark test as nondestructive (does not modify data)
diff --git a/tests/test_axe.py b/tests/test_axe.py
index 8d0dcfd..d149a9b 100644
--- a/tests/test_axe.py
+++ b/tests/test_axe.py
@@ -93,3 +93,119 @@ def test_write_results_without_filepath(mocker):
 
     assert data == actual_file_contents
     assert path.dirname(filename) == cwd
+
+
+def test_inject_reads_and_executes_script(tmp_path, mocker):
+    mock_selenium = mocker.MagicMock()
+    script_file = tmp_path / "axe.min.js"
+    script_file.write_text("console.log('axe injected');")
+
+    axe = Axe(mock_selenium, str(script_file))
+    axe.inject()
+
+    mock_selenium.execute_script.assert_called_once_with("console.log('axe injected');")
+
+
+def test_inject_missing_script_raises_error(mocker):
+    mock_selenium = mocker.MagicMock()
+    axe = Axe(mock_selenium, "nonexistent.js")
+
+    with pytest.raises(FileNotFoundError):
+        axe.inject()
+
+
+def test_run_with_context_and_options(mocker):
+    mock_selenium = mocker.MagicMock()
+    mock_selenium.execute_async_script.return_value = {"passes": []}
+
+    axe = Axe(mock_selenium)
+    context = {"include": [["#main"]]}
+    options = {"runOnly": {"type": "tag", "values": ["wcag2a"]}}
+
+    result = axe.run(context, options)
+
+    assert result == {"passes": []}
+    assert mock_selenium.execute_async_script.called
+    command = mock_selenium.execute_async_script.call_args[0][0]
+    assert "axe.run" in command
+    assert "wcag2a" in command
+
+
+@pytest.mark.parametrize("context,options", [
+    ({"include": [["#main"]]}, None),
+    (None, {"runOnly": {"type": "tag", "values": ["wcag2aa"]}}),
+])
+def test_run_with_single_arg_cases(mocker, context, options):
+    mock_selenium = mocker.MagicMock()
+    mock_selenium.execute_async_script.return_value = {"result": "ok"}
+    axe = Axe(mock_selenium)
+    axe.run(context, options)
+    called_script = mock_selenium.execute_async_script.call_args[0][0]
+    assert "axe.run" in called_script
+
+
+def test_run_with_invalid_script_raises(mocker):
+    mock_selenium = mocker.MagicMock()
+    mock_selenium.execute_async_script.side_effect = Exception("JS failed")
+
+    axe = Axe(mock_selenium)
+    with pytest.raises(Exception, match="JS failed"):
+        axe.run()
+
+
+def test_report_generates_expected_string(mocker):
+    axe = Axe(mocker.MagicMock())
+    violations = [{
+        "id": "color-contrast",
+        "description": "Elements must have sufficient color contrast",
+        "helpUrl": "https://example.com",
+        "impact": "serious",
+        "tags": ["wcag2aa", "contrast"],
+        "nodes": [{
+            "target": ["#header"],
+            "all": [{"message": "Check color contrast"}],
+            "any": [],
+            "none": []
+        }]
+    }]
+
+    report = axe.report(violations)
+    assert "Found 1 accessibility violations" in report
+    assert "color-contrast" in report
+    assert "#header" in report
+    assert "serious" in report
+
+
+def test_report_with_empty_list_returns_no_violation_text(mocker):
+    axe = Axe(mocker.MagicMock())
+    report = axe.report([])
+    assert "Found 0 accessibility violations" in report
+
+
+def test_write_results_default_name(tmp_path, mocker, monkeypatch):
+    axe = Axe(mocker.MagicMock())
+    monkeypatch.chdir(tmp_path)
+    data = {"k": "v"}
+    axe.write_results(data)
+    default_file = tmp_path / "results.json"
+    assert default_file.exists()
+
+
+def test_write_results_with_invalid_path(mocker):
+    axe = Axe(mocker.MagicMock())
+    data = {"key": "value"}
+
+    # Attempt writing to directory that does not exist
+    bad_path = "/invalid_dir/results.json"
+    with pytest.raises(OSError):
+        axe.write_results(data, bad_path)
+
+
+def test_write_results_with_unserializable_data(mocker, tmp_path):
+    axe = Axe(mocker.MagicMock())
+    filename = tmp_path / "results.json"
+
+    # Functions are not JSON-serializable
+    data = {"func": lambda x: x}
+    with pytest.raises(TypeError):
+        axe.write_results(data, str(filename))