diff --git a/tests/test_detector.py b/tests/test_detector.py
new file mode 100644
index 0000000..f6271dc
--- /dev/null
+++ b/tests/test_detector.py
@@ -0,0 +1,19 @@
+from pathlib import Path
+
+from tika import detector
+
+
+TEST_FILE_PATH = Path(__file__).parent / "files" / "rwservlet.pdf"
+
+
+def test_local_binary():
+    with open(TEST_FILE_PATH, "rb") as file_obj:
+        assert detector.from_file(file_obj) == "application/pdf"
+
+
+def test_local_path():
+    assert detector.from_file(str(TEST_FILE_PATH)) == "application/pdf"
+
+
+def test_local_buffer():
+    assert detector.from_buffer("Good evening, David. How are you?") == "text/plain"