diff --git a/.github/workflows/ci_workflows.yml b/.github/workflows/ci_workflows.yml
index 6958b385..b1a6f6e8 100644
--- a/.github/workflows/ci_workflows.yml
+++ b/.github/workflows/ci_workflows.yml
@@ -45,6 +45,7 @@ jobs:
         - linux: py310-test-pyqt63-all
         - linux: py311-test-pyqt64
         - linux: py312-test-pyqt65
+        - linux: py313-test-pyqt67
         - linux: py311-test-pyqt66-all
         - linux: py311-test-pyqt514
         - linux: py311-test-pyqt515-lts-all
@@ -57,20 +58,21 @@ jobs:
 
         # Test a few configurations on macOS 12 (Intel) and 14 (ARM)
         - macos: py38-test-pyqt514-all
-        - macos: py311-test-pyqt66
+        - macos: py311-test-pyqt65
         - macos: py312-test-pyqt67
+        - macos: py313-test-pyqt66
 
         # Test some configurations on Windows
-        - windows: py38-test-pyqt514
+        - windows: py39-test-pyqt514
         - windows: py310-test-pyqt63
         - windows: py311-test-pyqt65
         - windows: py312-test-pyqt66
 
         # Test against latest developer versions of some packages
-        - linux: py310-test-pyqt515-dev-all
         - linux: py311-test-pyqt64-dev
-        - linux: py312-test-pyqt515-dev
-        - linux: py312-test-pyqt67-dev-all
+        - linux: py312-test-pyqt515-dev-all
+        - linux: py312-test-pyqt67-dev
+        - linux: py313-test-pyqt66-dev-all
 
   allowed_failures:
     needs: initial_checks
diff --git a/glue_qt/viewers/profile/tests/test_data_viewer.py b/glue_qt/viewers/profile/tests/test_data_viewer.py
index 2a5b09f6..39662f9c 100644
--- a/glue_qt/viewers/profile/tests/test_data_viewer.py
+++ b/glue_qt/viewers/profile/tests/test_data_viewer.py
@@ -498,8 +498,10 @@ def test_unit_conversion_limits():
 
     assert viewer.state.x_min == 3.0
     assert viewer.state.x_max == 3.0
-    assert viewer.state.y_min == 0.
-    assert viewer.state.y_max == 1.
+
+    # Limits for constant data == 3.0; this was broken up to glue-core 1.21.1 (glue-viz/glue#2513)
+    assert viewer.state.y_min in (2.7, 0.0)
+    assert viewer.state.y_max in (3.3, 1.0)
 
     # Explicitly set unit on y axis to enable unit conversion
     viewer.state.y_display_unit = 'Jy'
diff --git a/tox.ini b/tox.ini
index 2b4faba8..38db8122 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{38,39,310,311,312}-{codestyle,test,docs}-{pyqt514,pyqt515,pyside514,pyside515,pyqt63,pyqt64,pyqt66,pyqt67,pyqt65,pyqt63,pyside66,pyside67}-all-{dev,legacy}
+    py{38,39,310,311,312,313}-{codestyle,test,docs}-{pyqt514,pyqt515,pyside514,pyside515,pyqt63,pyqt64,pyqt66,pyqt67,pyqt65,pyqt63,pyside66,pyside67}-all-{dev,legacy}
 requires = pip >= 18.0
            setuptools >= 30.3.0
 
@@ -12,6 +12,7 @@ passenv =
 # Set to 1 to get more debug information from PyQt
 setenv =
     test: QT_DEBUG_PLUGINS = 0
+    dev: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/astropy/simple https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 whitelist_externals =
     find
     rm
@@ -40,8 +41,9 @@ deps =
     pyside65: PySide6==6.5.*
     pyside66: PySide6==6.6.*
     pyside67: PySide6==6.7.*
-    dev: git+https://github.com/numpy/numpy
-    dev: git+https://github.com/astropy/astropy
+    dev: numpy>=0.0.dev0
+    dev: astropy>=0.0.dev0
+    dev: git+https://github.com/glue-viz/glue
     lts: astropy==5.0.*
     lts: matplotlib==3.5.*
     # Pin numpy-lts until permanent solution for #2353/#2428