diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0f96a56..44cfce4 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -45,4 +45,4 @@ jobs:
       run: tox -e ${{ matrix.env != env.PYTHON_LATEST_TAG && matrix.env || 'pandas' }}
     - name: Test pytesseract package installation
       if: ${{ matrix.env == env.PYTHON_LATEST_TAG }}
-      run: python -mpip install -U . && python -mpip show pytesseract && python -c 'import pytesseract'
\ No newline at end of file
+      run: python -mpip install -U . && python -mpip show pytesseract && python -c 'import pytesseract'
diff --git a/tests/pytesseract_test.py b/tests/pytesseract_test.py
index 0afaa6e..3a54c71 100644
--- a/tests/pytesseract_test.py
+++ b/tests/pytesseract_test.py
@@ -27,6 +27,7 @@
 from pytesseract import TesseractNotFoundError
 from pytesseract import TSVNotSupported
 from pytesseract.pytesseract import file_to_dict
+from pytesseract.pytesseract import LANG_PATTERN
 from pytesseract.pytesseract import numpy_installed
 from pytesseract.pytesseract import pandas_installed
 from pytesseract.pytesseract import prepare
@@ -518,3 +519,20 @@ def test_get_tesseract_version_invalid(tesseract_version, expected_msg):
 
         (msg,) = e.value.args
         assert msg == expected_msg
+
+
+@pytest.mark.parametrize(
+    'lang',
+    [
+        'bhu',
+        'eng',
+        'bhu_eng',
+        'eng_bhu',
+        '7seg',
+        'bhu32',
+        'bhu32_7seg',
+        '7seg_eng',
+    ],
+)
+def test_allowed_language_formats(lang):
+    assert LANG_PATTERN.match(lang)