diff --git a/.gitignore b/.gitignore
index 40e7cb3ec7e789f1d55658d9559726592bd3eb72..3fa94f77fa61e46a88b7683abe7d1cbedef94519 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@ build/
 coverage/
 /.coverage
 test/coverage.xml
+test/htmlcov
 
 # Docker
 dockerfiles/id_rsa*
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f0f0a2895a8c4965919d7d6d8c4045ce8b0a805e..6998195a11f3db020e9ca8fb69c89e6ecdaa30da 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,14 +21,14 @@ prepare:
     - git submodule update --init --recursive
     - conda update -n base -c defaults conda
     - conda update conda
-    - conda install -n autosubmit3 coverage=6
+    - conda install -n autosubmit3 pytest pytest-cov
     - conda env update -f environment.yml -n autosubmit3 python=3.7.3
 
 test_python3:
   stage: test
   script:
     - conda activate autosubmit3
-    - python3 -m 'nose' --exclude=regression  --verbosity=3 test/unit --with-coverage --cover-package=autosubmit --cover-inclusive --cover-xml --cover-xml-file=test/coverage.xml
+    - pytest
   coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
   # These artifacts are saved with every build in GitLab and can be reviewed later. If
   # we have a folder with HTML files, as in this example, users can navigate with their
diff --git a/easybuild/README.md b/easybuild/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..c5c5eafae6fbd7c4ff9b13aba7eae69568ef0e74
--- /dev/null
+++ b/easybuild/README.md
@@ -0,0 +1,17 @@
+Files to build an EasyBuild installation for Autosubmit.
+
+Ref: https://earth.bsc.es/gitlab/es/autosubmit/-/issues/1257
+
+Building locally, to test it first:
+
+```bash
+$ docker login ghcr.io -u kinow
+$ docker run --rm -ti \
+    -u easybuild \
+    -v $(pwd -P)/autosubmit-4-foss-2021b-Python-3.9.6.eb:/home/easybuild/autosubmit-4-foss-2021b-Python-3.9.6.eb \
+    -w /home/easybuild ghcr.io/easybuilders/ubuntu-20.04:2024-01-17-7559408166.106 \
+    /bin/bash
+easybuild@e9c0fc4f3b5d:~$ pip install easybuild
+easybuild@e9c0fc4f3b5d:~$ export PATH="$PATH:/home/easybuild/.local/bin:/usr/lmod/8.6.12/libexec/"
+easybuild@e9c0fc4f3b5d:~$ EB_VERBOSE=1 eb autosubmit-*.eb --rebuild
+```
diff --git a/easybuild/autosubmit-4-foss-2021b-Python-3.9.6.eb b/easybuild/autosubmit-4-foss-2021b-Python-3.9.6.eb
new file mode 100644
index 0000000000000000000000000000000000000000..4834364d33e8e8fa14c41781c7030848932c4e57
--- /dev/null
+++ b/easybuild/autosubmit-4-foss-2021b-Python-3.9.6.eb
@@ -0,0 +1,55 @@
+easyblock = "PythonPackage"
+
+name = 'autosubmit'
+version = 'v4.1.6'
+
+homepage = 'http://autosubmit.readthedocs.org'
+description = """A versatile tool for managing ESM on HPC platforms"""
+
+toolchain = SYSTEM
+#toolchain = {'name': 'foss', 'version': '2021b'}
+
+#sources = [SOURCELOWER_TAR_GZ]
+#source_urls = ['https://pypi.python.org/packages/source/a/autosubmit']
+
+sources = ['autosubmit-%(version)s.tar.gz']
+
+python = 'Python'
+pyver = '3.8.10'
+pyshortver = '3.6'
+versionsuffix = '-%s-%s' % (python, pyver)
+
+# Numpy 1.21 is the last release with 3.7+ support.
+# Numpy 1.24 is the last release with 3.8+ support.
+# Numpy 1.25 and greater requires 3.9+.
+# https://endoflife.date/numpy#python-support
+# Since our current setup.py declares 3.7 as minimum requirement,
+# this function patches the setup.py file temporarily.
+preinstallopts = """if grep -E "numpy<2" setup.py ; then \
+  sed -i "s/numpy<2/numpy<1.22/g" setup.py ; \
+else \
+  sed -i "s/install_requires\s*=\s*\[/install_requires=\['numpy<1.22',/g" setup.py ; \
+fi ;\
+if grep -E "matplotlib" setup.py ; then \
+
+fi \
+&&
+"""
+
+dependencies = [
+#    (python, pyver),
+#    ('libpng','1.6.37'),
+]
+
+#use_pip = True
+# override extensions sanity check, default filter that imports a Python module doesn't work here
+exts_filter = ('', "")
+
+sanity_check_paths = {
+    'files': ['bin/autosubmit'],
+    'dirs': [],
+}
+
+#sanity_check_commands = [('autosubmit -v','')]
+
+moduleclass = 'tools'
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000000000000000000000000000000000000..298d65bd2835f3a8f31227edde8a362ebfc1cdea
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,9 @@
+[pytest]
+addopts =
+    --verbose --ignore=regression --cov=autosubmit --cov-config=.coveragerc --cov-report=html:test/htmlcov --cov-report=xml:test/coverage.xml
+testpaths =
+    test/unit
+doctest_optionflags =
+    NORMALIZE_WHITESPACE
+    IGNORE_EXCEPTION_DETAIL
+    ELLIPSIS
diff --git a/setup.py b/setup.py
index d4a763a162dc03f748edc3f1e18b57fb18efe243..4a2779dda06936257f1d01d9f6bf52e546902e35 100644
--- a/setup.py
+++ b/setup.py
@@ -27,6 +27,58 @@ here = path.abspath(path.dirname(__file__))
 with open(path.join(here, 'VERSION')) as f:
     version = f.read().strip()
 
+install_requires = [
+    'xlib==0.21',
+    'setuptools<=68.2.2',
+    'bscearth.utils<=0.5.2',
+    'requests<=2.31.0',
+    'networkx<=2.6.3',
+    'portalocker<=2.7.0',
+    'mock<=5.1.0',
+    'paramiko<=3.4',
+    'pyparsing==3.1.1',
+    'matplotlib<=3.8.3',
+    'argparse<=1.4.0',
+    'packaging<=23.2',
+    'ruamel.yaml.clib<=0.2.8',
+    'typing_extensions<=4.9.0',
+    'typing<=3.7.4.3',
+    'psutil<=5.6.1',
+    'networkx<=2.6.3',
+    'py3dotplus==1.1.0',
+    'matplotlib<=3.8.3',
+    'numpy<2',
+    'ruamel.yaml==0.17.21',
+    'rocrate==0.*',
+    'autosubmitconfigparser==1.0.62',
+    'configparser',
+    'pathlib',
+    'setproctitle',
+    'sqlalchemy[mypy]'
+]
+
+pg_require = [
+    'psycopg2'
+]
+
+tests_require = [
+    'mock==5.1.0',
+    'nose==1.3.7',
+    'pytest==8.2.*',
+    'pytest-cov',
+    'pytest-mock',
+    'testcontainers'
+]
+
+# You can add more groups, e.g. all_require = tests_require + graph_require, etc...
+all_require = tests_require + pg_require
+
+extras_require = {
+    'postgres': pg_require,
+    'tests': tests_require,
+    'all': all_require
+}
+
 setup(
     name='autosubmit',
     license='GNU GPL v3',
@@ -39,79 +91,11 @@ setup(
     url='http://www.bsc.es/projects/earthscience/autosubmit/',
     download_url='https://earth.bsc.es/wiki/doku.php?id=tools:autosubmit',
     keywords=['climate', 'weather', 'workflow', 'HPC'],
-    install_requires=[
-        'xlib==0.21',
-        'setuptools<=68.2.2',
-        'bscearth.utils<=0.5.2',
-        'requests<=2.31.0',
-        'networkx<=2.6.3',
-        'portalocker<=2.7.0',
-        'mock<=5.1.0',
-        'paramiko<=3.4',
-        'pyparsing==3.1.1',
-        'matplotlib<=3.8.3',
-        'argparse<=1.4.0',
-        'packaging<=23.2',
-        'ruamel.yaml.clib<=0.2.8',
-        'typing_extensions<=4.9.0',
-        'typing<=3.7.4.3',
-        'psutil<=5.6.1',
-        'networkx<=2.6.3',
-        'py3dotplus==1.1.0',
-        'matplotlib<=3.8.3',
-        'numpy<2',
-        'ruamel.yaml==0.17.21',
-        'rocrate==0.*',
-        'autosubmitconfigparser==1.0.62',
-        'configparser',
-        'pathlib',
-        'setproctitle'
-
-    ],
-    extras_require={
-        ':python_version <= "3.7"':
-            [
-                'PyNaCl==1.5.0',
-                'pythondialog==3.5.3',
-                'xlib==0.21',
-                'setuptools==68.2.2',
-                'cryptography==41.0.5',
-                'bscearth.utils==0.5.2',
-                'requests==2.31.0',
-                'networkx==2.6.3',
-                'portalocker==2.7.0',
-                'mock==5.1.0',
-                'paramiko==3.3.1',
-                'matplotlib==3.5.3',
-                'python_dateutil==2.8.2',
-                'argparse==1.4.0',
-                'configobj==5.0.8',
-                'packaging==23.2',
-                'bcrypt==4.0.1',
-                'charset_normalizer==3.3.1',
-                'kiwisolver==1.4.5',
-                'fonttools==4.43.1',
-                'cycler==0.12.1',
-                'typing_extensions==4.8.0',
-                'psutil==5.6.1',
-                'Pygments==2.3.1',
-                'coverage==5.0',
-                'nose==1.3.7',
-                'six==1.12.0',
-                'Cython==0.29.6',
-                'cffi==1.12.2',
-                'py==1.8.0',
-                'atomicwrites==1.3.0',
-                'attrs==19.1.0',
-                'more_itertools==6.0.0',
-                'urllib3==1.24.1',
-                'idna==2.8',
-                'Pillow==6.2.1',
-                'numpy==1.17.4',
-            ],
-    },
+    install_requires=install_requires,
+    extras_require=extras_require,
     classifiers=[
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "License :: OSI Approved :: GNU General Public License (GPL)",
         "Operating System :: POSIX :: Linux",
@@ -131,4 +115,3 @@ setup(
     },
     scripts=['bin/autosubmit']
 )
-