diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 55663fb43..86e0535f8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Install dependencies
         uses: ./.github/actions/install-dependencies
         with:
-          uv-sync-extra-args: "--group linting"
+          uv-sync-extra-args: "--group linting --no-default-groups"
 
       # Code based on https://pre-commit.com/#github-actions-example
       - name: Set `PY` envvar
@@ -40,7 +40,7 @@ jobs:
       - name: Install dependencies
         uses: ./.github/actions/install-dependencies
         with:
-          uv-sync-extra-args: "--group ci"
+          uv-sync-extra-args: "--group ci --no-default-groups"
 
       - name: Create `.env`
         shell: bash
diff --git a/README.md b/README.md
index 13db4051c..ec962fae1 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@
 1. Install dev dependencies:
    (this will create a `.venv` folder inside your repository folder, by default)
    ```shell
-   uv sync --group dev
+   uv sync
    ```
 1. Create an empty `.env` file directly inside the repository folder, and fill it by
    copying the contents of [`.env.example`](.env.example)
diff --git a/pyproject.toml b/pyproject.toml
index 9d56c4218..bf52ca246 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -116,10 +116,8 @@ lint.isort.combine-as-imports = true
 lint.pycodestyle.ignore-overlong-task-comments = true
 
 [tool.uv]
-# Don't install `dev` by default (see
-# https://docs.astral.sh/uv/concepts/projects/dependencies/#default-groups), to make it
-# easier to *not* install those dependencies in prod
-default-groups = [  ]
+# https://docs.astral.sh/uv/concepts/projects/dependencies/#default-groups
+default-groups = [ "dev" ]
 
 [tool.uv.sources]
 python-ldap = [