diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f34de0c..feffbc4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -38,7 +38,7 @@ jobs:
           auto-update-conda: false
           python-version: ${{ matrix.python-version }}
           channels: conda-forge,nodefaults
-          mamba-version: "*"
+          miniforge-variant: Mambaforge
 
       - name: Install core dependencies.
         shell: bash -l {0}
diff --git a/environment.yml b/environment.yml
index 11da13d..5dcba2b 100644
--- a/environment.yml
+++ b/environment.yml
@@ -12,7 +12,7 @@ dependencies:
 
   # Package dependencies
   - pytask >= 0.3
-  - pytask-parallel >= 0.1
+  - pytask-parallel >= 0.3
   - latex-dependency-scanner >=0.1.1
   - pybaum >=0.1.1
 
diff --git a/tests/test_execute.py b/tests/test_execute.py
index ce893bc..1492bd6 100644
--- a/tests/test_execute.py
+++ b/tests/test_execute.py
@@ -4,9 +4,6 @@
 from pathlib import Path
 
 import pytest
-from conftest import needs_latexmk
-from conftest import skip_on_github_actions_with_win
-from conftest import TEST_RESOURCES
 from pytask import cli
 from pytask import ExitCode
 from pytask import main
@@ -14,6 +11,10 @@
 from pytask import Task
 from pytask_latex.execute import pytask_execute_task_setup
 
+from tests.conftest import needs_latexmk
+from tests.conftest import skip_on_github_actions_with_win
+from tests.conftest import TEST_RESOURCES
+
 
 @pytest.mark.unit()
 def test_pytask_execute_task_setup(monkeypatch):
diff --git a/tests/test_latex_dependency_scanner.py b/tests/test_latex_dependency_scanner.py
index 6a14990..c0e292f 100644
--- a/tests/test_latex_dependency_scanner.py
+++ b/tests/test_latex_dependency_scanner.py
@@ -3,11 +3,12 @@
 import textwrap
 
 import pytest
-from conftest import needs_latexmk
-from conftest import skip_on_github_actions_with_win
 from pytask import ExitCode
 from pytask import main
 
+from tests.conftest import needs_latexmk
+from tests.conftest import skip_on_github_actions_with_win
+
 
 @needs_latexmk
 @skip_on_github_actions_with_win
diff --git a/tests/test_parallel.py b/tests/test_parallel.py
index 92bab10..51656b5 100644
--- a/tests/test_parallel.py
+++ b/tests/test_parallel.py
@@ -6,11 +6,12 @@
 import time
 
 import pytest
-from conftest import needs_latexmk
-from conftest import skip_on_github_actions_with_win
 from pytask import cli
 from pytask import ExitCode
 
+from tests.conftest import needs_latexmk
+from tests.conftest import skip_on_github_actions_with_win
+
 
 try:
     import pytask_parallel  # noqa: F401
diff --git a/tests/test_parametrize.py b/tests/test_parametrize.py
index 6096bad..3673407 100644
--- a/tests/test_parametrize.py
+++ b/tests/test_parametrize.py
@@ -3,11 +3,12 @@
 import textwrap
 
 import pytest
-from conftest import needs_latexmk
-from conftest import skip_on_github_actions_with_win
 from pytask import ExitCode
 from pytask import main
 
+from tests.conftest import needs_latexmk
+from tests.conftest import skip_on_github_actions_with_win
+
 
 @needs_latexmk
 @skip_on_github_actions_with_win
diff --git a/tox.ini b/tox.ini
index b8d4147..076b1eb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,8 +9,8 @@ basepython = python
 
 [testenv:pytest]
 conda_deps =
-    pytask >=0.2
-    pytask-parallel >=0.1
+    pytask >=0.3
+    pytask-parallel >=0.3
     latex-dependency-scanner
     pytest
     pytest-cov