diff --git a/tests/test_salary_lookup.py b/tests/test_salary_lookup.py
index bf647b0..a03ef03 100644
--- a/tests/test_salary_lookup.py
+++ b/tests/test_salary_lookup.py
@@ -1,8 +1,14 @@
+"""Tests for salary_lookup.py — format_entry, match_score, and search_company."""
+
 import unittest
 
-from salary_lookup import format_entry, search_company
+from salary_lookup import format_entry, match_score, search_company
 
 
+# ---------------------------------------------------------------------------
+# format_entry tests (from #75 / #98)
+# ---------------------------------------------------------------------------
+
 class FormatEntryTests(unittest.TestCase):
     def test_zero_count_is_displayed_as_zero(self):
         entry = {
@@ -67,6 +73,77 @@ class FormatEntryTests(unittest.TestCase):
         self.assertIn("+12.5%", rendered)
 
 
+# ---------------------------------------------------------------------------
+# match_score tests (from #106)
+# ---------------------------------------------------------------------------
+
+class TestMatchScoreExactMatch(unittest.TestCase):
+    def test_exact_match_returns_100(self):
+        self.assertEqual(match_score("Novo Nordisk", "Novo Nordisk"), 100)
+
+    def test_exact_match_case_insensitive(self):
+        self.assertEqual(match_score("NOVO NORDISK", "Novo Nordisk"), 100)
+
+    def test_exact_match_after_suffix_stripping(self):
+        self.assertEqual(match_score("Mærsk", "Mærsk A/S"), 100)
+
+
+class TestMatchScoreSubstring(unittest.TestCase):
+    def test_query_contained_in_entry_gives_high_score(self):
+        score = match_score("Carlsberg", "Carlsberg Danmark A/S")
+        self.assertGreaterEqual(score, 80)
+
+    def test_entry_contained_in_query_gives_high_score(self):
+        score = match_score("Carlsberg Danmark", "Carlsberg")
+        self.assertGreaterEqual(score, 80)
+
+
+class TestMatchScoreShortQuery(unittest.TestCase):
+    def test_short_query_no_word_overlap_returns_zero(self):
+        score = match_score("ab", "Something Unrelated Company")
+        self.assertEqual(score, 0)
+
+    def test_short_query_with_word_overlap_scores(self):
+        score = match_score("IBM", "IBM Corporation")
+        self.assertGreater(score, 0)
+
+
+class TestMatchScoreAnglicize(unittest.TestCase):
+    def test_oe_variant_matches_o_with_slash(self):
+        score = match_score("Maersk", "Mærsk A/S")
+        self.assertGreater(score, 0)
+
+    def test_aa_variant_matches_aa(self):
+        self.assertEqual(match_score("Aarsleff", "Aarsleff"), 100)
+
+    def test_danish_characters_roundtrip(self):
+        score = match_score("Maersk", "Mærsk A/S")
+        self.assertGreater(score, 0)
+
+
+class TestMatchScoreNoOverlap(unittest.TestCase):
+    def test_completely_unrelated_names_return_zero(self):
+        self.assertEqual(match_score("Apple", "Vestas Wind Systems"), 0)
+
+    def test_empty_query_returns_zero(self):
+        self.assertEqual(match_score("", "Novo Nordisk"), 0)
+
+    def test_empty_entry_returns_zero(self):
+        self.assertEqual(match_score("Novo Nordisk", ""), 0)
+
+
+# ---------------------------------------------------------------------------
+# search_company tests (from #75 / #98 and #106)
+# ---------------------------------------------------------------------------
+
+def _make_data(*entries):
+    return {"companies": list(entries)}
+
+
+def _entry(company, city=""):
+    return {"company": company, "city": city}
+
+
 class SearchCompanyTests(unittest.TestCase):
     def test_search_company_with_none_city(self):
         data = {
@@ -81,5 +158,79 @@ class SearchCompanyTests(unittest.TestCase):
         self.assertEqual(results, [])
 
 
+class TestSearchCompanyBasicMatch(unittest.TestCase):
+    def test_exact_name_returns_match(self):
+        data = _make_data(_entry("Novo Nordisk", "Bagsværd"))
+        results = search_company(data, "Novo Nordisk")
+        self.assertEqual(len(results), 1)
+        self.assertEqual(results[0]["company"], "Novo Nordisk")
+
+    def test_no_match_returns_empty_list(self):
+        data = _make_data(_entry("Vestas Wind Systems", "Aarhus"))
+        results = search_company(data, "Apple")
+        self.assertEqual(results, [])
+
+    def test_multiple_candidates_all_returned(self):
+        data = _make_data(
+            _entry("Carlsberg A/S", "Copenhagen"),
+            _entry("Carlsberg Danmark", "Fredericia"),
+            _entry("Unrelated Corp", "Odense"),
+        )
+        results = search_company(data, "Carlsberg")
+        companies = [r["company"] for r in results]
+        self.assertIn("Carlsberg A/S", companies)
+        self.assertIn("Carlsberg Danmark", companies)
+        self.assertNotIn("Unrelated Corp", companies)
+
+
+class TestSearchCompanyCityFilter(unittest.TestCase):
+    def test_matching_city_is_included(self):
+        data = _make_data(
+            _entry("Novo Nordisk", "Bagsværd"),
+            _entry("Novo Nordisk", "Aarhus"),
+        )
+        results = search_company(data, "Novo Nordisk", city="Aarhus")
+        self.assertEqual(len(results), 1)
+        self.assertEqual(results[0]["city"], "Aarhus")
+
+    def test_non_matching_city_is_excluded(self):
+        data = _make_data(_entry("Novo Nordisk", "Bagsværd"))
+        results = search_company(data, "Novo Nordisk", city="Odense")
+        self.assertEqual(results, [])
+
+    def test_no_city_filter_returns_all_cities(self):
+        data = _make_data(
+            _entry("Novo Nordisk", "Bagsværd"),
+            _entry("Novo Nordisk", "Aarhus"),
+        )
+        results = search_company(data, "Novo Nordisk")
+        self.assertEqual(len(results), 2)
+
+    def test_city_filter_case_insensitive(self):
+        data = _make_data(_entry("Novo Nordisk", "København"))
+        results = search_company(data, "Novo Nordisk", city="københavn")
+        self.assertEqual(len(results), 1)
+
+    def test_anglicized_city_matches_danish_city(self):
+        data = _make_data(_entry("Novo Nordisk", "København"))
+        results = search_company(data, "Novo Nordisk", city="kobenhavn")
+        self.assertEqual(len(results), 1)
+
+
+class TestSearchCompanyScoreThreshold(unittest.TestCase):
+    def test_low_score_matches_excluded(self):
+        data = _make_data(_entry("Novo Nordisk", "Bagsværd"))
+        results = search_company(data, "xyz")
+        self.assertEqual(results, [])
+
+    def test_results_sorted_by_relevance_descending(self):
+        data = _make_data(
+            _entry("Novo Nordisk International", "Bagsværd"),
+            _entry("Novo Nordisk", "Bagsværd"),
+        )
+        results = search_company(data, "Novo Nordisk")
+        self.assertEqual(results[0]["company"], "Novo Nordisk")
+
+
 if __name__ == "__main__":
     unittest.main()