diff --git a/tests/data/test_ed25519/scalar_reduce.json b/tests/data/test_ed25519/scalar_reduce.json
new file mode 100644
index 0000000..2288411
--- /dev/null
+++ b/tests/data/test_ed25519/scalar_reduce.json
@@ -0,0 +1,122 @@
+{
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+    "result": "09ed72c713d3e9e19bef2f5204cf85f6cb25de7842aa0722abeb12697f171903"
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+    "modulo": 1392893316046758958341260910102289687388301813348474214190735334873552483750,
+    "result": "a67505f92004dd6242b64acd16e34ecf788a2d28b6072091e054238d84591403"
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+    "result": "60916cfcb10fa0b2b0648e36ecd7037f5c1972d36b2e6d56c2f4feca613a4200"
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+  },
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+    "modulo": 4934006092806529577549102959370432947234008351057795724965518070089460639572,
+    "result": "5467825ef0148a11582115f80b01c9af90fe31216a9cf6fb2d6b3c78698ce80a"
+  },
+  "5973d91299466a9a51ddfcd20d1710c776aa1399279b292b264ab6b7ab608105": {
+    "integer": 2490154711420054482973427955977087630958526490925203328128860118211022648153,
+    "modulo": 2490154711420054482973427955977087630958526490925203328128860118211022648153,
+    "result": "5973d91299466a9a51ddfcd20d1710c776aa1399279b292b264ab6b7ab608105"
+  },
+  "3922528967d829c5334978295f4aaa4a24154334a3b43af1da05244ec4cf252d": {
+    "integer": 20420885481516297805400244677782227685119906340516184899355036869276044763705,
+    "modulo": 5946874326851773377453871551696239203405673621756369687351134992705136261727,
+    "result": "5f7a66cf32120515870f89e3a156ec2024154334a3b43af1da05244ec4cf250d"
+  }
+}
diff --git a/tests/test_ed25519.py b/tests/test_ed25519.py
new file mode 100644
index 0000000..9f968f5
--- /dev/null
+++ b/tests/test_ed25519.py
@@ -0,0 +1,31 @@
+from binascii import hexlify, unhexlify
+import json
+import os
+import unittest
+
+from monero import ed25519
+
+
+class TestEd25519(unittest.TestCase):
+    base_path = os.path.join(os.path.dirname(__file__), "data", "test_ed25519")
+
+    def modulo_python(self, v):
+        return v % ed25519.l
+
+    def test_scalar_reduce(self):
+        with open(os.path.join(self.base_path, "scalar_reduce.json"), "rb") as jsonfile:
+            suite = json.load(jsonfile)
+        for input_, data in suite.items():
+            input_bin = ed25519.pad_to_64B(unhexlify(input_))
+            integer = ed25519.decodeint(input_bin)
+            print(integer)
+            print(ed25519.l)
+            self.assertEqual(data["integer"], integer)
+            modulo_bin = ed25519.scalar_reduce(input_bin)
+            print(hexlify(modulo_bin).decode())
+            print(hexlify(ed25519.encodeint(self.modulo_python(integer))).decode())
+            print(ed25519.decodeint(modulo_bin))
+            print(data["modulo"])
+            self.assertEqual(data["modulo"], ed25519.decodeint(modulo_bin))
+            modulo_hex = hexlify(modulo_bin).decode()
+            self.assertEqual(data["result"], modulo_hex)