diff --git a/src/dinglehopper/tests/test_integ_cli_line_dirs.py b/src/dinglehopper/tests/test_integ_cli_line_dirs.py
new file mode 100644
index 0000000..90cbabf
--- /dev/null
+++ b/src/dinglehopper/tests/test_integ_cli_line_dirs.py
@@ -0,0 +1,61 @@
+import json
+import os.path
+import re
+
+import pytest
+
+from ..cli_line_dirs import process
+from .util import working_directory
+
+data_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "data")
+
+
+@pytest.mark.integration
+def test_cli_line_dirs_basic(tmp_path):
+    """Test that the cli/process() produces a good report"""
+
+    with working_directory(tmp_path):
+        gt_dir = os.path.join(data_dir, "line_dirs/basic/gt")
+        ocr_dir = os.path.join(data_dir, "line_dirs/basic/ocr")
+        process(gt_dir, ocr_dir, "report")
+        with open("report.json", "r") as jsonf:
+            print(jsonf.read())
+        with open("report.json", "r") as jsonf:
+            j = json.load(jsonf)
+            assert j["cer"] == pytest.approx(0.1071429)
+            assert j["wer"] == pytest.approx(0.5)
+
+
+@pytest.mark.integration
+def test_cli_line_dirs_basic_report_diff(tmp_path):
+    """Test that the cli/process() produces a report wiff char+word diff"""
+
+    with working_directory(tmp_path):
+        gt_dir = os.path.join(data_dir, "line_dirs/basic/gt")
+        ocr_dir = os.path.join(data_dir, "line_dirs/basic/ocr")
+        process(gt_dir, ocr_dir, "report")
+
+        with open("report.html", "r") as htmlf:
+            html_report = htmlf.read()
+
+    # Counting GT lines in the diff
+    assert len(re.findall(r"gt.*l\d+-cdiff", html_report)) == 2
+    assert len(re.findall(r"gt.*l\d+-wdiff", html_report)) == 2
+
+
+@pytest.mark.integration
+def test_cli_line_dirs_merged(tmp_path):
+    """Test that the cli/process() produces a good report"""
+
+    with working_directory(tmp_path):
+        gt_dir = os.path.join(data_dir, "line_dirs/merged")
+        ocr_dir = os.path.join(data_dir, "line_dirs/merged")
+        process(
+            gt_dir, ocr_dir, "report", gt_suffix=".gt.txt", ocr_suffix=".some-ocr.txt"
+        )
+        with open("report.json", "r") as jsonf:
+            print(jsonf.read())
+        with open("report.json", "r") as jsonf:
+            j = json.load(jsonf)
+            assert j["cer"] == pytest.approx(0.1071429)
+            assert j["wer"] == pytest.approx(0.5)