--- a
+++ b/tests/unit/test_redactor.py
@@ -0,0 +1,81 @@
+import docdeid as dd
+
+from deduce.redactor import DeduceRedactor
+
+
+class TestDeduceRedactor:
+    def test_redact_patient(self):
+        proc = DeduceRedactor()
+        text = "Jan Jansen"
+
+        annotations = dd.AnnotationSet(
+            [
+                dd.Annotation(text="Jan", start_char=0, end_char=3, tag="patient"),
+                dd.Annotation(text="Jansen", start_char=4, end_char=10, tag="patient"),
+            ]
+        )
+
+        expected_text = "[PATIENT] [PATIENT]"
+
+        assert proc.redact(text, annotations) == expected_text
+
+    def test_redact_mixed(self):
+        proc = DeduceRedactor()
+        text = "Jan Jansen, wonende in Rotterdam"
+
+        annotations = dd.AnnotationSet(
+            [
+                dd.Annotation(
+                    text="Jan Jansen", start_char=0, end_char=10, tag="patient"
+                ),
+                dd.Annotation(
+                    text="Rotterdam", start_char=23, end_char=32, tag="woonplaats"
+                ),
+            ]
+        )
+
+        expected_text = "[PATIENT], wonende in [WOONPLAATS-1]"
+
+        assert proc.redact(text, annotations) == expected_text
+
+    def test_redact_count_multiple(self):
+        proc = DeduceRedactor()
+        text = "Jan Jansen, wonende in Rotterdam, verhuisd vanuit Groningen"
+
+        annotations = dd.AnnotationSet(
+            [
+                dd.Annotation(
+                    text="Rotterdam", start_char=23, end_char=32, tag="woonplaats"
+                ),
+                dd.Annotation(
+                    text="Groningen", start_char=50, end_char=59, tag="woonplaats"
+                ),
+            ]
+        )
+
+        expected_text = (
+            "Jan Jansen, wonende in [WOONPLAATS-1], verhuisd vanuit [WOONPLAATS-2]"
+        )
+
+        assert proc.redact(text, annotations) == expected_text
+
+    def test_redact_count_multiple_fuzzy(self):
+        proc = DeduceRedactor()
+        text = "Jan Jansen, wonende in Ommen, verhuisd vanuit Emmen"
+
+        annotations = dd.AnnotationSet(
+            [
+                dd.Annotation(
+                    text="Ommen", start_char=23, end_char=28, tag="woonplaats"
+                ),
+                dd.Annotation(
+                    text="Emmen", start_char=46, end_char=51, tag="woonplaats"
+                ),
+            ]
+        )
+
+        expected_text = (
+            "Jan Jansen, wonende in [WOONPLAATS-1], verhuisd vanuit [WOONPLAATS-1]"
+        )
+
+        assert proc.redact(text, annotations) == expected_text