diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e3ade008..c26194af 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,31 +23,42 @@ jobs:
           path: .
           fetch-depth: 0  # avoid shallow clone with no tags
 
-      - name: Install Mamba
-        run: |
-          wget "https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-Linux-x86_64.sh" -O mambaforge.sh
-          bash mambaforge.sh -b -p $HOME/mambaforge
-          echo "$HOME/mambaforge/bin" >> $GITHUB_PATH
-          source $HOME/mambaforge/etc/profile.d/conda.sh
-          conda init bash
+      - name: initialize miniconda
+        # this uses a marketplace action that sets up miniconda in a way that makes
+        # it easier to use.  I tried setting it up without this and it was a pain
+        uses: conda-incubator/setup-miniconda@v2
+        with:
+          activate-environment: test
+          # environment.yml file is needed by this action.  Because I don't want
+          # maintain this but rather maintain the requirements files it just has
+          # basic things in it like conda and pip
+          environment-file: ./environment.yml
+          python-version: 3
+          auto-activate-base: false
 
-      - name: Create conda environment
+      - name: install diffpy.pdfgui requirements
+        shell: bash -l {0}
         run: |
-          source $HOME/mambaforge/etc/profile.d/conda.sh
-          conda create -n test_env python=3.12 xonsh regolith -c conda-forge -y
-          conda activate test_env
-          pip install case_insensitive_dict
+          conda config --set always_yes yes --set changeps1 no
+          conda config --add channels conda-forge
+          conda activate test
+          conda install --file requirements/run.txt
+          conda install --file requirements/test.txt
+          pip install .
+
+      - name: Install Xvfb
+        run: sudo apt-get install -y xvfb
 
-      - name: Install dependencies
+      - name: Start Xvfb
         run: |
-          source $HOME/mambaforge/etc/profile.d/conda.sh
-          conda activate test_env
-          mamba install --file requirements/run.txt
-          mamba install --file requirements/test.txt
-          pip install -e .
+          export DISPLAY=:99
+          Xvfb :99 -screen 0 1024x768x16 &
 
-      - name: Use Xvfb Action
-        uses: GabrielBB/xvfb-action@v1
-        with:
-          run: |
-            bash -c "source $HOME/mambaforge/etc/profile.d/conda.sh && conda activate test_env && python -m run_tests.py"
+      - name: Validate diffpy.pdfgui
+        shell: bash -l {0}
+        run: |
+          export DISPLAY=:99
+          conda activate test
+          coverage run -m pytest -vv -s
+          coverage report -m
+          codecov
diff --git a/run_tests.py b/run_tests.py
deleted file mode 100644
index a2a69494..00000000
--- a/run_tests.py
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/usr/bin/env python
-
-import diffpy.pdfgui.tests
-
-assert diffpy.pdfgui.tests.testdeps().wasSuccessful()
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 1738fd08..00000000
--- a/setup.py
+++ /dev/null
@@ -1,161 +0,0 @@
-#!/usr/bin/env python
-
-# Installation script for diffpy.pdfgui
-
-"""PDFgui - graphical user interface for real space structure refinement.
-
-Packages:   diffpy.pdfgui
-Scripts:    pdfgui
-"""
-
-import os
-import re
-import sys
-
-from setuptools import find_packages, setup
-
-# Use this version when git data are not available, like in git zip archive.
-# Update when tagging a new release.
-FALLBACK_VERSION = "2.0.4"
-
-# determine if we run with Python 3.
-PY3 = sys.version_info[0] == 3
-
-# versioncfgfile holds version data for git commit hash and date.
-# It must reside in the same directory as version.py.
-MYDIR = os.path.dirname(os.path.abspath(__file__))
-versioncfgfile = os.path.join(MYDIR, "src/diffpy/pdfgui/version.cfg")
-gitarchivecfgfile = os.path.join(MYDIR, ".gitarchive.cfg")
-
-
-def gitinfo():
-    from subprocess import PIPE, Popen
-
-    kw = dict(stdout=PIPE, cwd=MYDIR, universal_newlines=True)
-    proc = Popen(["git", "describe", "--tags", "--match=v[[:digit:]]*"], **kw)
-    desc = proc.stdout.read()
-    proc = Popen(["git", "log", "-1", "--format=%H %ct %ci"], **kw)
-    glog = proc.stdout.read()
-    rv = {}
-    rv["version"] = ".post".join(desc.strip().split("-")[:2]).lstrip("v")
-    rv["commit"], rv["timestamp"], rv["date"] = glog.strip().split(None, 2)
-    return rv
-
-
-def getversioncfg():
-    if PY3:
-        from configparser import RawConfigParser
-    else:
-        from ConfigParser import RawConfigParser
-    vd0 = dict(version=FALLBACK_VERSION, commit="", date="", timestamp=0)
-    # first fetch data from gitarchivecfgfile, ignore if it is unexpanded
-    g = vd0.copy()
-    cp0 = RawConfigParser(vd0)
-    cp0.read(gitarchivecfgfile)
-    if len(cp0.get("DEFAULT", "commit")) > 20:
-        g = cp0.defaults()
-        mx = re.search(r"\btag: v(\d[^,]*)", g.pop("refnames"))
-        if mx:
-            g["version"] = mx.group(1)
-    # then try to obtain version data from git.
-    gitdir = os.path.join(MYDIR, ".git")
-    if os.path.exists(gitdir) or "GIT_DIR" in os.environ:
-        try:
-            g = gitinfo()
-        except OSError:
-            pass
-    # finally, check and update the active version file
-    cp = RawConfigParser()
-    cp.read(versioncfgfile)
-    d = cp.defaults()
-    rewrite = not d or (g["commit"] and (g["version"] != d.get("version") or g["commit"] != d.get("commit")))
-    if rewrite:
-        cp.set("DEFAULT", "version", g["version"])
-        cp.set("DEFAULT", "commit", g["commit"])
-        cp.set("DEFAULT", "date", g["date"])
-        cp.set("DEFAULT", "timestamp", g["timestamp"])
-        with open(versioncfgfile, "w") as fp:
-            cp.write(fp)
-    return cp
-
-
-versiondata = getversioncfg()
-
-
-def dirglob(d, *patterns):
-    from glob import glob
-
-    rv = []
-    for p in patterns:
-        rv += glob(os.path.join(d, p))
-    return rv
-
-
-with open(os.path.join(MYDIR, "README.rst")) as fp:
-    long_description = fp.read()
-
-# define distribution
-setup_args = dict(
-    name="diffpy.pdfgui",
-    version="3.0.5",
-    packages=find_packages(os.path.join(MYDIR, "src")),
-    package_dir={"": "src"},
-    include_package_data=True,
-    test_suite="diffpy.pdfgui.tests",
-    entry_points={
-        "gui_scripts": [
-            "pdfgui=diffpy.pdfgui.applications.pdfgui:main",
-        ],
-    },
-    data_files=[
-        ("icons", dirglob("icons", "*.png", "*.ico")),
-        ("doc", dirglob("doc", "*.pdf")),
-        ("doc/manual", dirglob("doc/manual", "*.html", "*.pdf")),
-        ("doc/manual/images", dirglob("doc/manual/images", "*.png")),
-        ("doc/tutorial", dirglob("doc/tutorial", "*")),
-    ],
-    # manual and tutorial files should not be zipped
-    zip_safe=False,
-    install_requires=[
-        "six",
-        "diffpy.structure>=3",
-        "diffpy.pdffit2",
-        "diffpy.utils",
-    ],
-    author="Simon J.L. Billinge",
-    author_email="sb2896@columbia.edu",
-    maintainer="Pavol Juhas",
-    maintainer_email="pavol.juhas@gmail.com",
-    url="https://github.com/diffpy/diffpy.pdfgui",
-    description="GUI for PDF simulation and structure refinement.",
-    long_description=long_description,
-    long_description_content_type="text/x-rst",
-    license="BSD",
-    keywords="PDF structure refinement GUI",
-    classifiers=[
-        # List of possible values at
-        # http://pypi.python.org/pypi?:action=list_classifiers
-        "Development Status :: 5 - Production/Stable",
-        "Environment :: MacOS X",
-        "Environment :: Win32 (MS Windows)",
-        "Environment :: X11 Applications",
-        "Intended Audience :: Science/Research",
-        "License :: OSI Approved :: BSD License",
-        "Operating System :: MacOS",
-        "Operating System :: Microsoft :: Windows",
-        "Operating System :: POSIX",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.10",
-        "Topic :: Scientific/Engineering :: Chemistry",
-        "Topic :: Scientific/Engineering :: Physics",
-    ],
-)
-
-if __name__ == "__main__":
-    setup(**setup_args)
-
-# End of file
diff --git a/src/diffpy/pdfgui/tests/conftest.py b/src/diffpy/pdfgui/tests/conftest.py
index e3b63139..fefe798b 100644
--- a/src/diffpy/pdfgui/tests/conftest.py
+++ b/src/diffpy/pdfgui/tests/conftest.py
@@ -1,9 +1,14 @@
 import json
+import subprocess
 from pathlib import Path
 
 import pytest
 
 
+def pytest_collection_modifyitems(session, config, items):
+    subprocess.run(["python", "-m", "diffpy.pdfgui.tests.rundeps"], check=True)
+
+
 @pytest.fixture
 def user_filesystem(tmp_path):
     base_dir = Path(tmp_path)
diff --git a/src/diffpy/pdfgui/tests/testaboutdialog.py b/src/diffpy/pdfgui/tests/test_aboutdialog.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testaboutdialog.py
rename to src/diffpy/pdfgui/tests/test_aboutdialog.py
diff --git a/src/diffpy/pdfgui/tests/testcalculation.py b/src/diffpy/pdfgui/tests/test_calculation.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testcalculation.py
rename to src/diffpy/pdfgui/tests/test_calculation.py
diff --git a/src/diffpy/pdfgui/tests/testconstraint.py b/src/diffpy/pdfgui/tests/test_constraint.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testconstraint.py
rename to src/diffpy/pdfgui/tests/test_constraint.py
diff --git a/src/diffpy/pdfgui/tests/testdatasetpanels.py b/src/diffpy/pdfgui/tests/test_datasetpanels.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testdatasetpanels.py
rename to src/diffpy/pdfgui/tests/test_datasetpanels.py
diff --git a/src/diffpy/pdfgui/tests/testdopingseriespanel.py b/src/diffpy/pdfgui/tests/test_dopingseriespanel.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testdopingseriespanel.py
rename to src/diffpy/pdfgui/tests/test_dopingseriespanel.py
diff --git a/src/diffpy/pdfgui/tests/testextendedplotframe.py b/src/diffpy/pdfgui/tests/test_extendedplotframe.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testextendedplotframe.py
rename to src/diffpy/pdfgui/tests/test_extendedplotframe.py
diff --git a/src/diffpy/pdfgui/tests/testfitdataset.py b/src/diffpy/pdfgui/tests/test_fitdataset.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testfitdataset.py
rename to src/diffpy/pdfgui/tests/test_fitdataset.py
diff --git a/src/diffpy/pdfgui/tests/testfitstructure.py b/src/diffpy/pdfgui/tests/test_fitstructure.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testfitstructure.py
rename to src/diffpy/pdfgui/tests/test_fitstructure.py
diff --git a/src/diffpy/pdfgui/tests/testinsertrowsdialog.py b/src/diffpy/pdfgui/tests/test_insertrowsdialog.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testinsertrowsdialog.py
rename to src/diffpy/pdfgui/tests/test_insertrowsdialog.py
diff --git a/src/diffpy/pdfgui/tests/testloadproject.py b/src/diffpy/pdfgui/tests/test_loadproject.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testloadproject.py
rename to src/diffpy/pdfgui/tests/test_loadproject.py
diff --git a/src/diffpy/pdfgui/tests/testmainframe.py b/src/diffpy/pdfgui/tests/test_mainframe.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testmainframe.py
rename to src/diffpy/pdfgui/tests/test_mainframe.py
diff --git a/src/diffpy/pdfgui/tests/testparameter.py b/src/diffpy/pdfgui/tests/test_parameter.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testparameter.py
rename to src/diffpy/pdfgui/tests/test_parameter.py
diff --git a/src/diffpy/pdfgui/tests/testparameterspanel.py b/src/diffpy/pdfgui/tests/test_parameterspanel.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testparameterspanel.py
rename to src/diffpy/pdfgui/tests/test_parameterspanel.py
diff --git a/src/diffpy/pdfgui/tests/testpdfdataset.py b/src/diffpy/pdfgui/tests/test_pdfdataset.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testpdfdataset.py
rename to src/diffpy/pdfgui/tests/test_pdfdataset.py
diff --git a/src/diffpy/pdfgui/tests/testpdfguicontrol.py b/src/diffpy/pdfgui/tests/test_pdfguicontrol.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testpdfguicontrol.py
rename to src/diffpy/pdfgui/tests/test_pdfguicontrol.py
diff --git a/src/diffpy/pdfgui/tests/testpdfstructure.py b/src/diffpy/pdfgui/tests/test_pdfstructure.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testpdfstructure.py
rename to src/diffpy/pdfgui/tests/test_pdfstructure.py
diff --git a/src/diffpy/pdfgui/tests/testphaseconfigurepanel.py b/src/diffpy/pdfgui/tests/test_phaseconfigurepanel.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testphaseconfigurepanel.py
rename to src/diffpy/pdfgui/tests/test_phaseconfigurepanel.py
diff --git a/src/diffpy/pdfgui/tests/teststructureviewer.py b/src/diffpy/pdfgui/tests/test_structureviewer.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/teststructureviewer.py
rename to src/diffpy/pdfgui/tests/test_structureviewer.py
diff --git a/src/diffpy/pdfgui/tests/testtemperatureseriespanel.py b/src/diffpy/pdfgui/tests/test_temperatureseriespanel.py
similarity index 100%
rename from src/diffpy/pdfgui/tests/testtemperatureseriespanel.py
rename to src/diffpy/pdfgui/tests/test_temperatureseriespanel.py