diff --git a/postreise/plot/tests/conftest.py b/postreise/plot/tests/conftest.py
new file mode 100644
index 00000000..0cda5181
--- /dev/null
+++ b/postreise/plot/tests/conftest.py
@@ -0,0 +1,8 @@
+import matplotlib.pyplot as plt
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def plt_close():
+    yield
+    plt.close("all")
diff --git a/pytest.ini b/pytest.ini
deleted file mode 100644
index b0189af7..00000000
--- a/pytest.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[pytest]
-addopts = --cov=postreise
diff --git a/tox.ini b/tox.ini
index 9fb5aae4..4cdcb8fa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,3 +24,6 @@ ignore = E501,W503,E203,E741
 
 [isort]
 profile = black
+
+[pytest]
+addopts = --cov=postreise