diff --git a/environments/docker/requirements.txt b/environments/docker/requirements.txt
index 4541a3c29..5cc85cbb0 100644
--- a/environments/docker/requirements.txt
+++ b/environments/docker/requirements.txt
@@ -31,7 +31,6 @@ pip
 twine
 
 # linting/testing
-black
 nbdime
 nbqa
 pre-commit
diff --git a/tests/environments/env-ci.yml b/tests/environments/env-ci.yml
index 897c9c93c..fe2b9d12f 100644
--- a/tests/environments/env-ci.yml
+++ b/tests/environments/env-ci.yml
@@ -22,7 +22,6 @@ dependencies:
   - scipy
 
   # linting/testing
-  - black=23
   - hatch
   - pre-commit
   - pytest
diff --git a/tests/environments/env-test-minimal.yml b/tests/environments/env-test-minimal.yml
index e050db23e..30ed6c4f2 100644
--- a/tests/environments/env-test-minimal.yml
+++ b/tests/environments/env-test-minimal.yml
@@ -25,7 +25,6 @@ dependencies:
   - scipy=1.5
 
   # linting/testing
-  - black=23
   - hatch
   - pre-commit
   - pytest
diff --git a/tests/format.sh b/tests/format.sh
index 7523b2535..628a86743 100644
--- a/tests/format.sh
+++ b/tests/format.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
 ruff check . --fix-only
-black .
+ruff format .