diff --git a/changes/3656.misc.md b/changes/3656.misc.md
new file mode 100644
index 0000000000..159f24d072
--- /dev/null
+++ b/changes/3656.misc.md
@@ -0,0 +1 @@
+Removed *rich* and *mypy* from the `[test]` dependencies, and added a new `[dev]` dependency group that can be used to install all the development dependencies.
diff --git a/pyproject.toml b/pyproject.toml
index 4e9e16730a..e09bab4cb9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,15 +70,13 @@ gpu = [
     "cupy-cuda12x",
 ]
 cli = ["typer"]
-# Development extras
+# Testing extras
 test = [
     "coverage>=7.10",
     "pytest",
     "pytest-asyncio",
     "pytest-cov",
     "pytest-accept",
-    "rich",
-    "mypy",
     'numpydoc',
     "hypothesis",
     "pytest-xdist",
@@ -116,6 +114,14 @@ docs = [
     'astroid<4',
     'pytest'
 ]
+# All development extras
+dev = [
+    "zarr[optional]",
+    "zarr[test]",
+    "zarr[remote_tests]",
+    "zarr[docs]",
+    "mypy",
+]
 
 [project.scripts]
 zarr = "zarr._cli.cli:app"