Fix a test failure with recent versions of ... Pytest?  Python?

Taken from upstream:
https://github.com/keras-team/keras/commit/fe35050a8f18dc52304aa8da4e463eececa25240

diff --git a/tests/integration_tests/applications_test.py b/tests/integration_tests/applications_test.py
index 979f2f2abd6..6e3b57fa8e2 100644
--- a/tests/integration_tests/applications_test.py
+++ b/tests/integration_tests/applications_test.py
@@ -58,7 +58,8 @@ def _test_application_basic(app, last_dim=1000):
 def _test_application_notop(app, last_dim):
     output_shape = _get_output_shape(
         lambda: app(weights=None, include_top=False))
-    assert output_shape == (None, None, None, last_dim)
+    assert len(output_shape) == 4
+    assert output_shape[-1] == last_dim
 
 
 def test_mobilenet_v2_legacy_import():
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<div class='path'>path: <a href='/guix/log/?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>root</a>/<a href='/guix/log/tests?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>tests</a>/<a href='/guix/log/tests/cache.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be'>cache.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/cache.scm?id=778bde78cf184f4a713c67d0ae8af7899c4c95be&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-08-21 00:52:39 +0200'>2024-08-21</span></td><td><a href='/guix/commit/tests/cache.scm?id=d921c742b774a9f0a016f3db6442d5c58a330c92'>cache: Avoid cache cleanup storms from concurrent processes.</a><span class='msg-avail'>...<span class='msg-tooltip'>Reported by Christopher Baines &lt;guix@cbaines.net&gt;.

* guix/cache.scm (maybe-remove-expired-cache-entries): Define
‘expiry-port’; create it with ‘lock-file’.  Change ‘last-expiry-date’
accordingly.  Write timestamp straight to ‘expiry-port’.
* tests/cache.scm ("maybe-remove-expired-cache-entries, cleanup needed
but lock taken"): New test.

Change-Id: I22441d9d2c4a339d3d3878de131864db5a0ae826
</span></span></td><td>Ludovic Courtès</td></tr>