diff --git a/test_iconvcodec.py b/test_iconvcodec.py
index aaa5bc9..97d206c 100644
--- a/test_iconvcodec.py
+++ b/test_iconvcodec.py
@@ -5,9 +5,8 @@
 
 
 class TestIconvcodecModule(unittest.TestCase):
-    @unittest.skipUnless(sys.platform.startswith("linux"), "Linux only test")
     def test_encode(self):
-        bytestring = "Hallo".encode("T.61")
+        bytestring = "Hallo".encode("VISCII")
         self.assertEqual(bytestring, b"Hallo")
 
     def test_encode_with_long_out(self):
@@ -18,9 +17,8 @@ def test_encode_with_long_out(self):
         else:
             self.assertEqual(bytestring, b"TM")
 
-    @unittest.skipUnless(sys.platform.startswith("linux"), "Linux only test")
     def test_decode(self):
-        string = b"Hallo".decode("T.61")
+        string = b"Hallo".decode("VISCII")
         self.assertEqual(string, "Hallo")
 
     @unittest.skipUnless(sys.platform.startswith("linux"), "Linux only test")
@@ -45,3 +43,55 @@ def test_incremental_decode(self):
 
         self.assertEqual(first, "")
         self.assertEqual(second, "\u0141")
+
+    def test_available_encodings(self):
+        # Some from the list on https://www.gnu.org/software/libiconv/
+        encodings = (
+            *[f"ISO-8859-{i}" for i in (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16)],
+            *[
+                f"CP{i}"
+                for i in (
+                    437,
+                    737,
+                    775,
+                    852,
+                    855,
+                    857,
+                    858,
+                    860,
+                    861,
+                    862,
+                    863,
+                    865,
+                    869,
+                    1125,
+                    1133,
+                    1250,
+                    1251,
+                    1252,
+                    1253,
+                    1254,
+                    1257,
+                )
+            ],
+            # "Georgian-PS",
+            # "ARMSCII-8",
+            "KOI8-T",
+            "PT154",
+            "RK1048",
+            "VISCII",
+            "TCVN",
+            "Macintosh",
+        )
+        for encoding in encodings:
+            with self.subTest(encoding=encoding):
+                codec_info = iconvcodec.lookup(encoding)
+                if codec_info is None:
+                    self.fail(f"Unsupported codec: '{encoding}'")
+                # Actually test that encoding works
+                try:
+                    "a".encode(encoding)
+                except Exception as e:
+                    raise AssertionError(
+                        f"Codec lookup succeeded but encode failed for '{encoding}'"
+                    ) from None