diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ce4c2565827d4ddd19f57d6eb74bf19e353ed63a..fc4e16312a60f3bede8fd3f33d37b03384f24eb0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -22,7 +22,7 @@ tests-and-coverage:
     - py.test -v -n $NUM_CORES --cov-report html --cov-report term --cov=. -m "not longrun" --html test-report/index.html
   tags:
     - docker
-    - cuda
+    - cuda11
     - AVX
   artifacts:
     when: always
@@ -44,7 +44,7 @@ test-longrun:
     - py.test -v -n $NUM_CORES --cov-report html --cov-report term --cov=. --html test-report/index.html
   tags:
     - docker
-    - cuda
+    - cuda11
     - AVX
   artifacts:
     paths:
@@ -80,7 +80,7 @@ ubuntu:
     - pytest-3 -v -m "not longrun"
   tags:
     - docker
-    - cuda
+    - cuda11
     - AVX
 
 minimal-conda:
@@ -146,7 +146,7 @@ pycodegen-integration:
     - make -j $NUM_CORES
   tags:
     - docker
-    - cuda
+    - cuda11
     - AVX
 
 # -------------------- Linter & Documentation --------------------------------------------------------------------------
diff --git a/README.md b/README.md
index 80bf1176f40d582e5393937d222c127b3c7d4e51..fbe4e9cf430a45f311d43156b7af660b8c39c6fa 100644
--- a/README.md
+++ b/README.md
@@ -2,16 +2,16 @@ pystencils
 ==========
 
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/mabau/pystencils/master?filepath=doc%2Fnotebooks)
-[![Docs](https://img.shields.io/badge/read-the_docs-brightgreen.svg)](http://pycodegen.pages.walberla.net/pystencils)
+[![Docs](https://img.shields.io/badge/read-the_docs-brightgreen.svg)](https://pycodegen.pages.i10git.cs.fau.de/pystencils)
 [![pypi-package](https://badge.fury.io/py/pystencils.svg)](https://badge.fury.io/py/pystencils)
 [![pipeline status](https://i10git.cs.fau.de/pycodegen/pystencils/badges/master/pipeline.svg)](https://i10git.cs.fau.de/pycodegen/pystencils/commits/master)
-[![coverage report](https://i10git.cs.fau.de/pycodegen/pystencils/badges/master/coverage.svg)](http://pycodegen.pages.walberla.net/pystencils/coverage_report)
+[![coverage report](https://i10git.cs.fau.de/pycodegen/pystencils/badges/master/coverage.svg)](http://pycodegen.pages.i10git.cs.fau.de/pystencils/coverage_report)
 
 Run blazingly fast stencil codes on numpy arrays.
 
 *pystencils* uses sympy to define stencil operations, that can be executed on numpy arrays.
 Exploiting the stencil structure makes *pystencils* run faster than normal numpy code and even as Cython and numba,
-[as demonstrated in this notebook](http://pycodegen.pages.walberla.net/pystencils/notebooks/demo_benchmark.html).
+[as demonstrated in this notebook](https://pycodegen.pages.i10git.cs.fau.de/pystencils/notebooks/demo_benchmark.html).
 
 
 Here is a code snippet that computes the average of neighboring cells:
@@ -21,7 +21,7 @@ import numpy as np
 
 f, g = ps.fields("f, g : [2D]")
 stencil = ps.Assignment(g[0, 0],
-                        (f[1, 0] + f[-1, 0] + f[0, 1] + f[0, -1]) / 4)
+                       (f[1, 0] + f[-1, 0] + f[0, 1] + f[0, -1]) / 4)
 kernel = ps.create_kernel(stencil).compile()
 
 f_arr = np.random.rand(1000, 1000)
@@ -39,9 +39,6 @@ discretize = ps.fd.Discretization2ndOrder(dx=1, dt=0.01)
 discretization = discretize(adv_diff_pde)
 ```
 
-Look at the [documentation](http://pycodegen.pages.walberla.net/pystencils) to learn more.
-
-
 Installation
 ------------
 
@@ -69,5 +66,5 @@ pip install pystencils[interactive,gpu,doc]
 Documentation
 -------------
 
-Read the docs [here](http://pycodegen.pages.walberla.net/pystencils) and
+Read the docs [here](https://pycodegen.pages.i10git.cs.fau.de/pystencils) and
 check out the Jupyter notebooks in `doc/notebooks`.
diff --git a/conftest.py b/conftest.py
index cb17c79b1f5dfcffc12d8ffd822d17a9879aa97b..58b088bac360c36ae32587b1b689d6a185f5fc5f 100644
--- a/conftest.py
+++ b/conftest.py
@@ -25,6 +25,12 @@ except ImportError:
 SCRIPT_FOLDER = os.path.dirname(os.path.realpath(__file__))
 sys.path.insert(0, os.path.abspath('pystencils'))
 
+# the Ubuntu pipeline uses an older version of pytest which uses deprecated functionality.
+# This leads to many warinings in the test and coverage pipeline.
+pytest_numeric_version = [int(x, 10) for x in pytest.__version__.split('.')]
+pytest_numeric_version.reverse()
+pytest_version = sum(x * (100 ** i) for i, x in enumerate(pytest_numeric_version))
+
 
 def add_path_to_ignore(path):
     if not os.path.exists(path):
@@ -152,8 +158,10 @@ class IPyNbFile(pytest.File):
             warnings.filterwarnings("ignore", "IPython.core.inputsplitter is deprecated")
             notebook = nbformat.read(notebook_contents, 4)
             code, _ = exporter.from_notebook_node(notebook)
-        yield IPyNbTest(self.name, self, code)
-        # pytest v 2.4>: yield IPyNbTest.from_parent(name=self.name, parent=self, code=code)
+        if pytest_version >= 50403:
+            yield IPyNbTest.from_parent(name=self.name, parent=self, code=code)
+        else:
+            yield IPyNbTest(self.name, self, code)
 
     def teardown(self):
         pass
@@ -162,5 +170,7 @@ class IPyNbFile(pytest.File):
 def pytest_collect_file(path, parent):
     glob_exprs = ["*demo*.ipynb", "*tutorial*.ipynb", "test_*.ipynb"]
     if any(path.fnmatch(g) for g in glob_exprs):
-        return IPyNbFile(path, parent)
-        # pytest v 2.4 >: return IPyNbFile.from_parent(fspath=path, parent=parent)
+        if pytest_version >= 50403:
+            return IPyNbFile.from_parent(fspath=path, parent=parent)
+        else:
+            return IPyNbFile(path, parent)