diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ef697e5b..1eeb7f90 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -85,6 +85,7 @@ jobs:
         COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         CODACY_PROJECT_TOKEN: ${{ secrets.CODACY_PROJECT_TOKEN }}
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
   finish:
     name: pytest cov
     continue-on-error: ${{ github.event_name != 'push' }}
diff --git a/.meta/requirements-test.txt b/.meta/requirements-test.txt
index 4fc41b89..9264a2ab 100644
--- a/.meta/requirements-test.txt
+++ b/.meta/requirements-test.txt
@@ -1,7 +1,7 @@
 pre-commit
 pytest
-pytest-asyncio
+pytest-asyncio>=0.24
 pytest-cov
 pytest-timeout
-nbval
+git+https://github.com/casperdcl/nbval.git@master#egg=nbval
 ipywidgets
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0eff5698..01ea5432 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -37,7 +37,7 @@ repos:
     - numpy
     - pandas
     - pytest-timeout
-    - pytest-asyncio>0.21
+    - pytest-asyncio>=0.24
 - repo: https://github.com/PyCQA/flake8
   rev: 7.1.1
   hooks:
diff --git a/environment.yml b/environment.yml
index a8347fe7..89e0406c 100644
--- a/environment.yml
+++ b/environment.yml
@@ -20,8 +20,7 @@ dependencies:
 - pytest
 - pytest-cov
 - pytest-timeout
-- pytest-asyncio
-- nbval
+- pytest-asyncio>=0.24
 - coverage
 # extras
 - dask               # dask
@@ -35,12 +34,13 @@ dependencies:
 - rich               # rich
 - argopt             # `cd wiki && pymake`
 - twine              # `pymake check pypi`
-- build              # `python -m build`
+- python-build       # `python -m build`
 # `cd docs && pymake`
 - mkdocs-material
 - pygments
 - pymdown-extensions
 - pip:
+  - git+https://github.com/casperdcl/nbval.git@master#egg=nbval # tests (native)
   - py-make >=0.1.0                                          # `make/pymake`
   - mkdocs-minify-plugin                                     # `cd docs && pymake`
   - git+https://github.com/tqdm/jsmin@fix-pip#egg=jsmin      # `cd docs && pymake`
diff --git a/pyproject.toml b/pyproject.toml
index 5651e88e..c31f86a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -84,7 +84,7 @@ classifiers = [
 dependencies = ['colorama; platform_system == "Windows"']
 
 [project.optional-dependencies]
-dev = ["pytest>=6", "pytest-cov", "pytest-timeout", "pytest-xdist"]
+dev = ["pytest>=6", "pytest-cov", "pytest-timeout", "pytest-asyncio>=0.24", "nbval"]
 discord = ["requests"]
 slack = ["slack-sdk"]
 telegram = ["requests"]
diff --git a/tqdm/gui.py b/tqdm/gui.py
index 1a806819..cb52fb91 100644
--- a/tqdm/gui.py
+++ b/tqdm/gui.py
@@ -122,6 +122,7 @@ class tqdm_gui(std_tqdm):  # pragma: no cover
         ax = self.ax
         line1 = self.line1
         line2 = self.line2
+        hspan = getattr(self, 'hspan', None)
         # instantaneous rate
         y = delta_it / delta_t
         # overall rate
@@ -148,18 +149,10 @@ class tqdm_gui(std_tqdm):  # pragma: no cover
         if total:
             line1.set_data(xdata, ydata)
             line2.set_data(xdata, zdata)
-            try:
-                poly_lims = self.hspan.get_xy()
-            except AttributeError:
-                self.hspan = self.plt.axhspan(0, 0.001, xmin=0, xmax=0, color='g')
-                poly_lims = self.hspan.get_xy()
-            poly_lims[0, 1] = ymin
-            poly_lims[1, 1] = ymax
-            poly_lims[2] = [n / total, ymax]
-            poly_lims[3] = [poly_lims[2, 0], ymin]
-            if len(poly_lims) > 4:
-                poly_lims[4, 1] = ymin
-            self.hspan.set_xy(poly_lims)
+            if hspan:
+                hspan.set_xy((0, ymin))
+                hspan.set_height(ymax - ymin)
+                hspan.set_width(n / total)
         else:
             t_ago = [cur_t - i for i in xdata]
             line1.set_data(t_ago, ydata)