diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 20688e9f6c..ae9caec20c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -35,6 +35,10 @@ repos:
           )
       # catch git merge/rebase problems
       - id: check-merge-conflict
+      # sort requirements files
+      - id: file-contents-sorter
+        files: ^tests/requirements.*\.txt
+        args: [--unique]
   # Python verification and formatting
   - repo: https://github.com/Lucas-C/pre-commit-hooks
     rev: v1.5.4
diff --git a/tests/requirements-linux.txt b/tests/requirements-linux.txt
index cb3ae7e805..149ce09bad 100644
--- a/tests/requirements-linux.txt
+++ b/tests/requirements-linux.txt
@@ -1,5 +1,3 @@
-# conda-build supplemental test dependencies
-# run as 'conda install -c defaults --file tests/requirements-linux.txt'
 patch
 patchelf
 shellcheck
diff --git a/tests/requirements-macos.txt b/tests/requirements-macos.txt
index dbe8e3dd81..133b191333 100644
--- a/tests/requirements-macos.txt
+++ b/tests/requirements-macos.txt
@@ -1,4 +1,2 @@
-# conda-build supplemental test dependencies
-# run as 'conda install -c defaults --file tests/requirements-macos.txt'
 patch
 shellcheck
diff --git a/tests/requirements-windows.txt b/tests/requirements-windows.txt
index 8d40d2482b..d08b4cac29 100644
--- a/tests/requirements-windows.txt
+++ b/tests/requirements-windows.txt
@@ -1,4 +1,2 @@
-# conda-build supplemental test dependencies
-# run as 'conda install -c defaults --file tests/requirements-windows.txt'
 m2-git
 m2-patch
diff --git a/tests/requirements.txt b/tests/requirements.txt
index b0ac07be77..02d34d6787 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,9 +1,8 @@
-# conda-build test dependencies
-# run as 'conda install -c defaults --file tests/requirements.txt'
 anaconda-client
 beautifulsoup4
 chardet
 conda >=4.13
+conda-forge::allure-pytest
 conda-index
 conda-package-handling
 conda-verify
@@ -27,7 +26,6 @@ pytest-replay
 pytest-rerunfailures
 pytest-xdist
 python-libarchive-c
-conda-forge::allure-pytest
 pytz
 requests
 ripgrep