diff --git a/tests/test_fastcall.py b/tests/test_fastcall.py
index e27549e..ab6cd8f 100644
--- a/tests/test_fastcall.py
+++ b/tests/test_fastcall.py
@@ -51,19 +51,19 @@ def test_input_empty(self):
 
     def test_positional_seed_xxh32(self):
         for s in self.seeds_32:
-            self._check('xxh32', self.data, seed=s)
+            self._check('xxh32', self.data, s)
 
     def test_positional_seed_xxh64(self):
         for s in self.seeds_64:
-            self._check('xxh64', self.data, seed=s)
+            self._check('xxh64', self.data, s)
 
     def test_positional_seed_xxh3_64(self):
         for s in self.seeds_64:
-            self._check('xxh3_64', self.data, seed=s)
+            self._check('xxh3_64', self.data, s)
 
     def test_positional_seed_xxh3_128(self):
         for s in self.seeds_64:
-            self._check('xxh3_128', self.data, seed=s)
+            self._check('xxh3_128', self.data, s)
 
     # ── keyword input ─────────────────────────────────────────────
 
diff --git a/xxhash/version.py b/xxhash/version.py
index 1f5645f..ad975c9 100644
--- a/xxhash/version.py
+++ b/xxhash/version.py
@@ -1 +1 @@
-VERSION = "4.0.0.dev0"
+VERSION = "4.0.0.dev5"