diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
new file mode 100644
index 00000000..2909d67f
--- /dev/null
+++ b/.github/workflows/docs.yml
@@ -0,0 +1,43 @@
+name: Build Documentation
+
+on:
+  push:
+    branches:
+      - main
+  release:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          activate-environment: build
+          auto-update-conda: true
+
+      - name: install requirements
+        run: >-
+          conda install -n build -c conda-forge
+          --file requirements/build.txt
+          --file requirements/run.txt
+          --file requirements/docs.txt
+          --quiet --yes
+
+      - name: install the package
+        run: python -m pip install . --no-deps
+
+      - name: build documents
+        run: make -C doc html
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./doc/build/html
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 00000000..e3ade008
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,53 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - CI
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  miniconda:
+    name: Miniconda ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+        matrix:
+            os: ["ubuntu-latest"]
+    steps:
+      - name: check out diffpy.pdfgui
+        uses: actions/checkout@v3
+        with:
+          repository: diffpy/diffpy.pdfgui
+          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: Create conda environment
+        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
+
+      - name: Install dependencies
+        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 .
+
+      - 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"
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
new file mode 100644
index 00000000..f2ff7e42
--- /dev/null
+++ b/.github/workflows/pre-commit.yml
@@ -0,0 +1,19 @@
+name: pre-commit
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+
+jobs:
+  pre-commit:
+    # pull requests are a duplicate of a branch push if within the same repo.
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+      - uses: pre-commit/action@v3.0.0
+        with:
+          extra_args: --all-files
diff --git a/conda-recipe/run_test.py b/conda-recipe/dont_run.py
similarity index 100%
rename from conda-recipe/run_test.py
rename to conda-recipe/dont_run.py
diff --git a/conda-recipe/meta.yaml b/conda-recipe/meta.suppress_yaml
similarity index 96%
rename from conda-recipe/meta.yaml
rename to conda-recipe/meta.suppress_yaml
index 2eeff68a..568d0c7d 100644
--- a/conda-recipe/meta.yaml
+++ b/conda-recipe/meta.suppress_yaml
@@ -54,7 +54,7 @@ test:
     # entry points work.
 
 
-  # You can also put a file called run_test.py in the recipe that will be run
+  # You can also put a file called dont_run.py in the recipe that will be run
   # at test time.
 
   # requires:
diff --git a/environment.yml b/environment.yml
new file mode 100644
index 00000000..a3904941
--- /dev/null
+++ b/environment.yml
@@ -0,0 +1,6 @@
+name: diffpy.pdfgui
+channels:
+  - conda-forge
+dependencies:
+  - python=3
+  - pip
diff --git a/requirements/run.txt b/requirements/run.txt
index 10e45f83..40bce3f0 100644
--- a/requirements/run.txt
+++ b/requirements/run.txt
@@ -1,4 +1,4 @@
-numpy
+numpy==1.26
 wxpython
 diffpy.pdffit2
 diffpy.utils
diff --git a/requirements/test.txt b/requirements/test.txt
index 7167f602..628a048a 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -1,2 +1,4 @@
 pytest
 freezegun
+coverage
+codecov
diff --git a/run_tests.py b/run_tests.py
new file mode 100644
index 00000000..a2a69494
--- /dev/null
+++ b/run_tests.py
@@ -0,0 +1,5 @@
+#!/usr/bin/env python
+
+import diffpy.pdfgui.tests
+
+assert diffpy.pdfgui.tests.testdeps().wasSuccessful()
diff --git a/src/diffpy/pdfgui/applications/__init__.py b/src/diffpy/pdfgui/applications/__init__.py
index d698044f..8bdc5f5a 100644
--- a/src/diffpy/pdfgui/applications/__init__.py
+++ b/src/diffpy/pdfgui/applications/__init__.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2009 Trustees of the Columbia University
+#                   (c) 2009-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/control/structureviewer.py b/src/diffpy/pdfgui/control/structureviewer.py
index d58def97..85308d10 100644
--- a/src/diffpy/pdfgui/control/structureviewer.py
+++ b/src/diffpy/pdfgui/control/structureviewer.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2009 Trustees of the Columbia University
+#                   (c) 2009-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/gui/aboutdialog.py b/src/diffpy/pdfgui/gui/aboutdialog.py
index 37bd30c7..c71c45b3 100644
--- a/src/diffpy/pdfgui/gui/aboutdialog.py
+++ b/src/diffpy/pdfgui/gui/aboutdialog.py
@@ -4,6 +4,8 @@
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
 #                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2024 trustees of the Columbia University in the City
+#                   of New York
 #                   All rights reserved.
 #
 # File coded by:    Dmitriy Bryndin
@@ -233,7 +235,7 @@ def onColumbiaLogo(self, event):  # wxGlade: DialogAbout.<event_handler>
 
 # end of class DialogAbout
 
-##### testing code ###########################################################
+# #### testing code ###########################################################
 
 if __name__ == "__main__":
     app = wx.App()
diff --git a/src/diffpy/pdfgui/gui/adddatapanel.py b/src/diffpy/pdfgui/gui/adddatapanel.py
index 7f5f1407..15cb48ca 100644
--- a/src/diffpy/pdfgui/gui/adddatapanel.py
+++ b/src/diffpy/pdfgui/gui/adddatapanel.py
@@ -5,6 +5,7 @@
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
 #                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2024 trustees of the Columbia University in the City
 #                   All rights reserved.
 #
 # File coded by:    Chris Farrow
diff --git a/src/diffpy/pdfgui/gui/errorwrapper.py b/src/diffpy/pdfgui/gui/errorwrapper.py
index a45a55fc..de99d93b 100644
--- a/src/diffpy/pdfgui/gui/errorwrapper.py
+++ b/src/diffpy/pdfgui/gui/errorwrapper.py
@@ -75,7 +75,7 @@ def _f(*args, **kwargs):
             return rvpass
 
         # Everything else
-        except:
+        except Exception:
             if pdfguiglobals.dbopts.pythondebugger:
                 import pdb
 
diff --git a/src/diffpy/pdfgui/gui/fittree.py b/src/diffpy/pdfgui/gui/fittree.py
index 886a6e61..d82970c2 100644
--- a/src/diffpy/pdfgui/gui/fittree.py
+++ b/src/diffpy/pdfgui/gui/fittree.py
@@ -356,9 +356,9 @@ def AddFit(self, fitname="Fit 1", cdata=None, paste=False):
                 cdata = self.control.paste(cdata, None, fitname, pos)
             self.SetControlData(newfit, cdata)
             return newfit
-        except:
+        except Exception:
             self.Delete(newfit)
-            raise
+            raise Exception
         return
 
     def AddPhase(self, node, label, insertafter=None, filename=None, makedata=True, cdata=None):
@@ -427,9 +427,9 @@ def AddPhase(self, node, label, insertafter=None, filename=None, makedata=True,
             elif cdata is not None:
                 self.control.paste(cdata, pdata, label, pos)
             return newphase
-        except:
+        except Exception:
             self.Delete(newphase)
-            raise
+            raise Exception
         return
 
     def AddDataSet(self, node, label, insertafter=None, filename=None, makedata=True, cdata=None):
@@ -492,9 +492,9 @@ def AddDataSet(self, node, label, insertafter=None, filename=None, makedata=True
             elif cdata is not None:
                 self.control.paste(cdata, pdata, label, pos)
             return newset
-        except:
+        except Exception:
             self.Delete(newset)
-            raise
+            raise Exception
         return
 
     def AddCalc(self, node, label, insertafter=None, makedata=True, cdata=None):
@@ -553,9 +553,9 @@ def AddCalc(self, node, label, insertafter=None, makedata=True, cdata=None):
             elif cdata is not None:
                 self.control.paste(cdata, pdata, label, pos)
             return newcalc
-        except:
+        except Exception:
             self.Delete(newcalc)
-            raise
+            raise Exception
         return
 
     def CopyBranch(self, startnode):
@@ -611,7 +611,7 @@ def GetClipboard(self):
             if cdatabytes[:16] == "pdfgui_cliboard=".encode():
                 cdatabytes = cdatabytes[16:]
                 cdata = pickle_loads(cdatabytes)
-        except:
+        except Exception:
             pass
         return cdata
 
diff --git a/src/diffpy/pdfgui/gui/phasepanelutils.py b/src/diffpy/pdfgui/gui/phasepanelutils.py
index 6b4d03af..8459294e 100644
--- a/src/diffpy/pdfgui/gui/phasepanelutils.py
+++ b/src/diffpy/pdfgui/gui/phasepanelutils.py
@@ -234,7 +234,7 @@ def canPasteIntoCells(panel):
         # Strip any trailing tabs
         rowlist = [r.rstrip("\t") for r in rowlist]
         celllist = [r.split("\t") for r in rowlist]
-    except:
+    except wx.PyDeadObjectError:
         return False
 
     if len(celllist) == 0:
diff --git a/src/diffpy/pdfgui/gui/plotpanel.py b/src/diffpy/pdfgui/gui/plotpanel.py
index 241f4b48..eab29b06 100644
--- a/src/diffpy/pdfgui/gui/plotpanel.py
+++ b/src/diffpy/pdfgui/gui/plotpanel.py
@@ -16,8 +16,6 @@
 
 # generated by wxGlade 0.9.3 on Fri Jul 19 16:05:24 2019
 
-import sys
-
 import wx
 
 from diffpy.pdfgui.control.controlerrors import ControlConfigError
@@ -167,7 +165,7 @@ def _represent(mixedNames):
         xvals = _represent(xdata)
         try:
             xvals.remove("rw")
-        except:
+        except ValueError:
             pass
         numericStringSort(xvals)
 
diff --git a/src/diffpy/pdfgui/gui/wxextensions/wx12.py b/src/diffpy/pdfgui/gui/wxextensions/wx12.py
index 17a3f938..ddbc7641 100644
--- a/src/diffpy/pdfgui/gui/wxextensions/wx12.py
+++ b/src/diffpy/pdfgui/gui/wxextensions/wx12.py
@@ -46,7 +46,9 @@ def Append(self, *args, **kwargs):
 
 
 if WX4:
-    Menu = wx.Menu
+    RealMenu = wx.Menu
+else:
+    RealMenu = Menu
 
 # ----------------------------------------------------------------------------
 
@@ -58,7 +60,9 @@ class ListCtrl(wx.ListCtrl):
 
 
 if WX4:
-    ListCtrl = wx.ListCtrl
+    RealListCtrl = wx.ListCtrl
+else:
+    RealListCtrl = ListCtrl
 
 # ----------------------------------------------------------------------------
 
@@ -70,7 +74,9 @@ class TreeCtrl(wx.TreeCtrl):
 
 
 if WX4:
-    TreeCtrl = wx.TreeCtrl
+    RealTreeCtrl = wx.TreeCtrl
+else:
+    RealTreeCtrl = TreeCtrl
 
 # wx.ToolBar -----------------------------------------------------------------
 
@@ -92,6 +98,6 @@ def patchToolBarMethods(toolbar):
 
 # Final checks ---------------------------------------------------------------
 
-assert WX3 ^ (Menu is wx.Menu)
-assert WX3 ^ (TreeCtrl is wx.TreeCtrl)
-assert WX3 ^ (ListCtrl is wx.ListCtrl)
+assert WX3 ^ (RealMenu is wx.Menu)
+assert WX3 ^ (RealTreeCtrl is wx.TreeCtrl)
+assert WX3 ^ (RealListCtrl is wx.ListCtrl)
diff --git a/src/diffpy/pdfgui/tests/__init__.py b/src/diffpy/pdfgui/tests/__init__.py
index accc2e33..863e9949 100644
--- a/src/diffpy/pdfgui/tests/__init__.py
+++ b/src/diffpy/pdfgui/tests/__init__.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2012 Trustees of the Columbia University
+#                   (c) 2012-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/tests/run.py b/src/diffpy/pdfgui/tests/run.py
index f1bf407e..461d7c01 100644
--- a/src/diffpy/pdfgui/tests/run.py
+++ b/src/diffpy/pdfgui/tests/run.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2012 Trustees of the Columbia University
+#                   (c) 2012-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/tests/rundeps.py b/src/diffpy/pdfgui/tests/rundeps.py
index 0181a83f..9818fc86 100644
--- a/src/diffpy/pdfgui/tests/rundeps.py
+++ b/src/diffpy/pdfgui/tests/rundeps.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2012 Trustees of the Columbia University
+#                   (c) 2012-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/tests/showphasenotebookpanel.py b/src/diffpy/pdfgui/tests/showphasenotebookpanel.py
index 4dfb8cde..71c3f0d3 100644
--- a/src/diffpy/pdfgui/tests/showphasenotebookpanel.py
+++ b/src/diffpy/pdfgui/tests/showphasenotebookpanel.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2016 Trustees of the Columbia University
+#                   (c) 2016-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/tests/testutils.py b/src/diffpy/pdfgui/tests/testutils.py
index eb981e2b..70147319 100644
--- a/src/diffpy/pdfgui/tests/testutils.py
+++ b/src/diffpy/pdfgui/tests/testutils.py
@@ -3,7 +3,7 @@
 #
 # diffpy.pdfgui     by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2016 Trustees of the Columbia University
+#                   (c) 2016-2024 Trustees of the Columbia University
 #                   in the City of New York.  All rights reserved.
 #
 # File coded by:    Pavol Juhas