diff --git a/changes/3590.misc.md b/changes/3590.misc.md
new file mode 100644
index 0000000000..47f601d157
--- /dev/null
+++ b/changes/3590.misc.md
@@ -0,0 +1 @@
+Pin numcodecs version in v3 regression tests
diff --git a/tests/test_regression/scripts/v3.0.8.py b/tests/test_regression/scripts/v3.0.8.py
index f93f43fd57..5a055665e8 100644
--- a/tests/test_regression/scripts/v3.0.8.py
+++ b/tests/test_regression/scripts/v3.0.8.py
@@ -1,7 +1,8 @@
 # /// script
 # requires-python = "==3.12"
 # dependencies = [
-#  "zarr==3.0.8"
+#  "zarr==3.0.8",
+#  "numcodecs==0.16.3"
 # ]
 # ///