diff --git a/docs/development/index.md b/docs/development/index.md
index f93127efd53039bce614aa10bdf236de8235dc57..758fdadce7898c5b73865c308669a27fa38b2c05 100644
--- a/docs/development/index.md
+++ b/docs/development/index.md
@@ -138,31 +138,6 @@ We use [pre-commit](https://pre-commit.com) to run various checks (shortcut `mak
 pre-commit run --all-files
 ```
 
-## Testing with `tox`
-
-To test for different Python version you can use [`tox`](https://tox.wiki).
-
-To run the tests:
-
-```bash
-tox
-```
-
-:::{note}
-You can parallelize the tox tests with `tox -p`.
-:::
-
-You can also run a single test environment with e.g.:
-
-```bash
-tox -e py39
-```
-
-The following environments are available:
-
-```{command-output} tox list
-```
-
 ## Create a package
 
 ```bash
diff --git a/docs/releases/ogstools-0.0.3.md b/docs/releases/ogstools-0.0.3.md
index e0f922e9a1d4cb8492884a5e58ac9501336500cf..159ff5a5d7edf6a031d30cabd1dde10e764c2a33 100644
--- a/docs/releases/ogstools-0.0.3.md
+++ b/docs/releases/ogstools-0.0.3.md
@@ -16,4 +16,4 @@ This documentation website has been implemented and is available at <https://ogs
 
 ### Unit testing and style checks
 
-A [tox](https://tox.wiki)-based test driver for unit tests and style checks has been implemented. See [](../development/index.md#testing-with-tox) for more info.
+A [tox](https://tox.wiki)-based test driver for unit tests and style checks has been implemented.
diff --git a/pyproject.toml b/pyproject.toml
index 6af386e61115ff9048657d3dba72660a4c8e8bd9..e4b4fe7b3db4fc96c82dc39f51ceb8d72bc5cf98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ msh2vtu = 'ogstools.msh2vtu._cli:cli'
 feflow2ogs = 'ogstools.feflowlib._cli:cli'
 
 [project.optional-dependencies]
-dev = ["pre-commit>=2.20", "tox>=4.1", "build", "black"]
+dev = ["pre-commit>=2.20", "build", "black"]
 test = ["pytest", "coverage", "gmsh"]
 docs = [
   "sphinx",