diff --git a/.github/scripts/install.sh b/.github/scripts/install.sh
index a78c72930fd..a1c73bb79f8 100755
--- a/.github/scripts/install.sh
+++ b/.github/scripts/install.sh
@@ -34,13 +34,9 @@ if [ "$USE_CONDA" = "true" ]; then
         fi
     done
 
-    # Install jupyter_client 7.2.0 to prevent ZMQ Socket operation on non-socket
-    # Remove this when the issue is fixed upstream most probaly with jupyter_client=7.2.3
-    # See https://github.com/spyder-ide/spyder/issues/17615
-    mamba install jupyter_client=7.2.0 -c conda-forge -q -y
 else
     # Update pip and setuptools
-    pip install -U pip setuptools
+    python -m pip install -U pip setuptools
 
     # Install Spyder and its dependencies from our setup.py
     pip install -e .[test]
@@ -61,11 +57,6 @@ else
         pip uninstall $dep -q -y
     done
 
-    # Install jupyter_client 7.2.0 to prevent ZMQ Socket operation on non-socket
-    # Remove this when the issue is fixed upstream most probaly with jupyter_client=7.2.3
-    # See https://github.com/spyder-ide/spyder/issues/17615
-    pip install -q jupyter_client==7.2.0
-
     # Remove Spyder to properly install it below
     pip uninstall spyder -q -y
 fi
diff --git a/.github/workflows/test-files.yml b/.github/workflows/test-files.yml
index 585c5c784dc..882c48ecbb1 100644
--- a/.github/workflows/test-files.yml
+++ b/.github/workflows/test-files.yml
@@ -68,7 +68,7 @@ jobs:
         shell: bash
         run: |
           sudo apt-get update --fix-missing
-          sudo apt-get install libxcb-randr0-dev libxcb-xtest0-dev libxcb-xinerama0-dev libxcb-shape0-dev libxcb-xkb-dev libegl1-mesa libxkbcommon-x11-0 xterm --fix-missing
+          sudo apt-get install -qq pyqt5-dev-tools libxcb-xinerama0 xterm --fix-missing
       - name: Cache conda
         uses: actions/cache@v2
         env:
diff --git a/binder/environment.yml b/binder/environment.yml
index b0f03ea87a6..7cdc7d22f51 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -29,6 +29,7 @@ dependencies:
 - pylint >=2.5.0
 - pyls-spyder >=0.4.0
 - pyqt <5.16
+- pyqtwebengine <5.16
 - python-lsp-black >=1.2.0
 - python-lsp-server >=1.4.1,<1.5.0
 - pyxdg >=0.26
diff --git a/requirements/conda.txt b/requirements/conda.txt
index ebe2f09cb13..990723da9e2 100644
--- a/requirements/conda.txt
+++ b/requirements/conda.txt
@@ -25,6 +25,7 @@ pygments >=2.0
 pylint >=2.5.0
 pyls-spyder >=0.4.0
 pyqt <5.16
+pyqtwebengine <5.16
 python-lsp-black >=1.2.0
 python-lsp-server >=1.4.1,<1.5.0
 pyxdg >=0.26
diff --git a/spyder/plugins/variableexplorer/widgets/dataframeeditor.py b/spyder/plugins/variableexplorer/widgets/dataframeeditor.py
index 188f16fd127..2494c7bed26 100644
--- a/spyder/plugins/variableexplorer/widgets/dataframeeditor.py
+++ b/spyder/plugins/variableexplorer/widgets/dataframeeditor.py
@@ -1368,7 +1368,6 @@ def resize_to_contents(self):
 #==============================================================================
 def test_edit(data, title="", parent=None):
     """Test subroutine"""
-    app = qapplication()                  # analysis:ignore
     dlg = DataFrameEditor(parent=parent)
 
     if dlg.setup_and_check(data, title=title):
@@ -1384,6 +1383,8 @@ def test():
     from numpy import nan
     from pandas.util.testing import assert_frame_equal, assert_series_equal
 
+    app = qapplication()                  # analysis:ignore
+
     df1 = pd.DataFrame(
         [
             [True, "bool"],
diff --git a/spyder/plugins/variableexplorer/widgets/objecteditor.py b/spyder/plugins/variableexplorer/widgets/objecteditor.py
index 9f1d69afd7f..cc2747c8d1c 100644
--- a/spyder/plugins/variableexplorer/widgets/objecteditor.py
+++ b/spyder/plugins/variableexplorer/widgets/objecteditor.py
@@ -98,7 +98,7 @@ def end_func(dialog):
     return dialog, end_func
 
 
-def oedit(obj, modal=True, namespace=None):
+def oedit(obj, modal=True, namespace=None, app=None):
     """Edit the object 'obj' in a GUI-based editor and return the edited copy
     (if Cancel is pressed, return None)
 
@@ -110,10 +110,6 @@ def oedit(obj, modal=True, namespace=None):
     (instantiate a new QApplication if necessary,
     so it can be called directly from the interpreter)
     """
-    # Local import
-    from spyder.utils.qthelpers import qapplication
-    app = qapplication()
-
     if modal:
         obj_name = ''
     else:
@@ -137,7 +133,7 @@ def oedit(obj, modal=True, namespace=None):
     else:
         keeper.create_dialog(dialog, obj_name, end_func)
         import os
-        if os.name == 'nt':
+        if os.name == 'nt' and app:
             app.exec_()
 
 
@@ -146,6 +142,10 @@ def oedit(obj, modal=True, namespace=None):
 #==============================================================================
 def test():
     """Run object editor test"""
+    # Local import
+    from spyder.utils.qthelpers import qapplication
+    app = qapplication()  # analysis:ignore
+
     data = np.random.randint(1, 256, size=(100, 100)).astype('uint8')
     image = PIL.Image.fromarray(data)
     example = {'str': 'kjkj kj k j j kj k jkj',
@@ -164,10 +164,10 @@ def __init__(self):
             self.text = "toto"
     foobar = Foobar()
 
-    print(oedit(foobar))  # spyder: test-skip
-    print(oedit(example))  # spyder: test-skip
-    print(oedit(np.random.rand(10, 10)))  # spyder: test-skip
-    print(oedit(oedit.__doc__))  # spyder: test-skip
+    print(oedit(foobar, app=app))  # spyder: test-skip
+    print(oedit(example, app=app))  # spyder: test-skip
+    print(oedit(np.random.rand(10, 10), app=app))  # spyder: test-skip
+    print(oedit(oedit.__doc__, app=app))  # spyder: test-skip
     print(example)  # spyder: test-skip
 
 
diff --git a/spyder/tests/test_dependencies_in_sync.py b/spyder/tests/test_dependencies_in_sync.py
index 14d382f7991..ff57ff2309c 100644
--- a/spyder/tests/test_dependencies_in_sync.py
+++ b/spyder/tests/test_dependencies_in_sync.py
@@ -220,6 +220,8 @@ def test_dependencies_for_spyder_dialog_in_sync():
 
     if 'pyqt' in spyder_reqs:
         spyder_reqs.pop('pyqt')
+    if 'pyqtwebengine' in spyder_reqs:
+        spyder_reqs.pop('pyqtwebengine')
 
     assert spyder_deps == spyder_reqs
 
@@ -231,9 +233,6 @@ def test_dependencies_for_spyder_setup_install_requires_in_sync():
     spyder_setup = parse_setup_install_requires(SETUP_FPATH)
     spyder_reqs = parse_requirements(REQ_FPATH)
 
-    if 'pyqtwebengine' in spyder_setup:
-        spyder_setup.pop('pyqtwebengine')
-
     assert spyder_setup == spyder_reqs
 
 
diff --git a/spyder/widgets/collectionseditor.py b/spyder/widgets/collectionseditor.py
index cf1bc54c34a..0e0e92a58a9 100644
--- a/spyder/widgets/collectionseditor.py
+++ b/spyder/widgets/collectionseditor.py
@@ -1785,20 +1785,13 @@ def __init__(self):
 
 def editor_test():
     """Test Collections editor."""
-    from spyder.utils.qthelpers import qapplication
-
-    app = qapplication()             #analysis:ignore
     dialog = CollectionsEditor()
     dialog.setup(get_test_data())
     dialog.show()
-    app.exec_()
 
 
 def remote_editor_test():
     """Test remote collections editor."""
-    from spyder.utils.qthelpers import qapplication
-    app = qapplication()
-
     from spyder.config.manager import CONF
     from spyder_kernels.utils.nsview import (make_remote_view,
                                              REMOTE_SETTINGS)
@@ -1811,9 +1804,12 @@ def remote_editor_test():
     dialog = CollectionsEditor()
     dialog.setup(remote, remote=True)
     dialog.show()
-    app.exec_()
 
 
 if __name__ == "__main__":
+    from spyder.utils.qthelpers import qapplication
+
+    app = qapplication()  # analysis:ignore
     editor_test()
     remote_editor_test()
+    app.exec_()