test_tool_zoom.py::test_zoom_should_center_around_mouse_cursor failing in i686 chroot

[TinfoilSubmarine]

Describe the bug test_tool_zoom.py::test_zoom_should_center_around_mouse_cursor fails when run with i686 packages on an x86_64 chroot in Void Linux:

============================= test session starts ==============================
platform linux -- Python 3.10.4, pytest-7.1.2, pluggy-1.0.0
rootdir: /builddir/gaphas-3.6.0, configfile: pyproject.toml, testpaths: tests
collected 192 items

tests/test_canvas.py .........                                           [  4%]
tests/test_connections.py .......                                        [  8%]
tests/test_connector.py ...........                                      [ 14%]
tests/test_constraints.py ........                                       [ 18%]
tests/test_decorators.py ..........                                      [ 23%]
tests/test_element.py .........                                          [ 28%]
tests/test_freehand.py ..                                                [ 29%]
tests/test_geometry.py ...............                                   [ 36%]
tests/test_guide.py ......                                               [ 40%]
tests/test_handle.py .                                                   [ 40%]
tests/test_handle_move.py ....                                           [ 42%]
tests/test_item.py ....                                                  [ 44%]
tests/test_line.py .                                                     [ 45%]
tests/test_matrix.py .                                                   [ 45%]
tests/test_move.py .                                                     [ 46%]
tests/test_position.py ...............                                   [ 54%]
tests/test_quadtree.py .......                                           [ 57%]
tests/test_segment.py ...................                                [ 67%]
tests/test_solver.py ......                                              [ 70%]
tests/test_solver_constraint.py ......                                   [ 73%]
tests/test_solver_variable.py ............                               [ 80%]
tests/test_tool_hover.py ..                                              [ 81%]
tests/test_tool_item.py .........                                        [ 85%]
tests/test_tool_placement.py ..                                          [ 86%]
tests/test_tool_scroll.py ..                                             [ 88%]
tests/test_tool_zoom.py .....F..                                         [ 92%]
tests/test_tree.py .....                                                 [ 94%]
tests/test_view.py ..........                                            [100%]

=================================== FAILURES ===================================
_________________ test_zoom_should_center_around_mouse_cursor __________________

zoom_data = <gaphas.tool.zoom.Zoom object at 0xf4a495c8>
view = <gtkview.GtkView object at 0xf4a4c768 (GaphasView at 0x584cb988)>

    def test_zoom_should_center_around_mouse_cursor(zoom_data, view):
        tool = zoom_tool(view)
        view.add_controller(tool)
        zoom_data.x0 = 100
        zoom_data.y0 = 50
    
        on_scale_changed(tool, 1.2, zoom_data)
    
>       assert view.matrix[4] == -20.0
E       assert -19.999999999999996 == -20.0

tests/test_tool_zoom.py:84: AssertionError
=========================== short test summary info ============================
FAILED tests/test_tool_zoom.py::test_zoom_should_center_around_mouse_cursor

To Reproduce Steps to reproduce the behavior:

1. Run tests for gaphas in i686 chroot on x86_64 Void Linux host.

Expected behavior Tests should pass.

OS

• [x] Linux (Please put in notes the specific distro)
• [ ] MacOS
• [ ] Windows

NOTES:

Version Version of Gaphas: 3.6.0 Distro: Void Linux

Additional context I've opened a PR to add this package to the Void Linux repo here: https://github.com/void-linux/void-packages/pull/37270

The CI run fails for the i686 build here: https://github.com/void-linux/void-packages/runs/6576821953?check_suite_focus=true