diff --git a/MANIFEST.in b/MANIFEST.in
index 2fde07c7..90fc938c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -22,10 +22,3 @@ prune */spec
 prune xblocks_contrib/problem/capa/static/js/capa/spec
 prune xblocks_contrib/problem/capa/static/js/capa/fixtures
 prune xblocks_contrib/problem/capa/tests/test_files
-
-# --- TEST UTILITY INCLUSIONS ---
-# Re-include specific test files that are excluded above.
-# We do this because openedx-platform imports these specific test helpers.
-include xblocks_contrib/problem/capa/tests/test_util.py
-include xblocks_contrib/problem/capa/tests/helpers.py
-include xblocks_contrib/problem/capa/tests/response_xml_factory.py
diff --git a/xblocks_contrib/problem/capa/safe_exec/tests/test_safe_exec.py b/xblocks_contrib/problem/capa/safe_exec/tests/test_safe_exec.py
index 90f8420d..bb37b0db 100644
--- a/xblocks_contrib/problem/capa/safe_exec/tests/test_safe_exec.py
+++ b/xblocks_contrib/problem/capa/safe_exec/tests/test_safe_exec.py
@@ -24,7 +24,7 @@
     is_codejail_rest_service_enabled,
 )
 from xblocks_contrib.problem.capa.safe_exec.safe_exec import emsg_normalizers, normalize_error_message
-from xblocks_contrib.problem.capa.tests.test_util import UseUnsafeCodejail
+from xblocks_contrib.problem.capa.testing.codejail import UseUnsafeCodejail
 
 
 @UseUnsafeCodejail()
diff --git a/xblocks_contrib/problem/capa/testing/__init__.py b/xblocks_contrib/problem/capa/testing/__init__.py
new file mode 100644
index 00000000..d6754ebc
--- /dev/null
+++ b/xblocks_contrib/problem/capa/testing/__init__.py
@@ -0,0 +1,7 @@
+"""
+Reusable capa testing utilities.
+
+Unlike ``xblocks_contrib.problem.capa.tests``, this package ships in the
+published distribution: it holds the fixtures that downstream test suites --
+notably openedx-platform's -- import. Keep actual tests out of it.
+"""
diff --git a/xblocks_contrib/problem/capa/testing/codejail.py b/xblocks_contrib/problem/capa/testing/codejail.py
new file mode 100644
index 00000000..12e29bba
--- /dev/null
+++ b/xblocks_contrib/problem/capa/testing/codejail.py
@@ -0,0 +1,31 @@
+"""Codejail controls for tests that execute capa problem code."""
+
+import codejail.safe_exec
+from django.test.utils import TestContextDecorator
+
+
+class UseUnsafeCodejail(TestContextDecorator):
+    """
+    Tell codejail to run in unsafe mode for the scope of the decorator.
+    Use this as a decorator on Django TestCase classes or methods.
+
+    This is needed because codejail has significant OS-level setup requirements
+    which we don't even attempt to fulfill for unit testing purposes. Running
+    tests in unsafe mode (that is, running code executions in-process, with no
+    sandboxing) is only safe because we control the contents of the unit tests.
+    It's not a perfect replica of how safe mode operates but it's generally good
+    enough for testing the integration and overall behavior.
+    """
+
+    def __init__(self):
+        self.old_be_unsafe = None
+        super().__init__()
+
+    def enable(self):
+        """Enable unsafe mode for codejail within the test scope."""
+        self.old_be_unsafe = codejail.safe_exec.ALWAYS_BE_UNSAFE
+        codejail.safe_exec.ALWAYS_BE_UNSAFE = True
+
+    def disable(self):
+        """Restore the previous codejail unsafe mode state."""
+        codejail.safe_exec.ALWAYS_BE_UNSAFE = self.old_be_unsafe
diff --git a/xblocks_contrib/problem/capa/tests/response_xml_factory.py b/xblocks_contrib/problem/capa/testing/response_xml_factory.py
similarity index 100%
rename from xblocks_contrib/problem/capa/tests/response_xml_factory.py
rename to xblocks_contrib/problem/capa/testing/response_xml_factory.py
diff --git a/xblocks_contrib/problem/capa/tests/test_capa_problem.py b/xblocks_contrib/problem/capa/tests/test_capa_problem.py
index 4b449c7f..471da6b7 100644
--- a/xblocks_contrib/problem/capa/tests/test_capa_problem.py
+++ b/xblocks_contrib/problem/capa/tests/test_capa_problem.py
@@ -13,8 +13,8 @@
 
 from xblocks_contrib.problem.capa.correctmap import CorrectMap
 from xblocks_contrib.problem.capa.responsetypes import LoncapaProblemError
+from xblocks_contrib.problem.capa.testing.codejail import UseUnsafeCodejail
 from xblocks_contrib.problem.capa.tests.helpers import new_loncapa_problem
-from xblocks_contrib.problem.capa.tests.test_util import UseUnsafeCodejail
 from xblocks_contrib.problem.markup import HTML
 
 
diff --git a/xblocks_contrib/problem/capa/tests/test_html_render.py b/xblocks_contrib/problem/capa/tests/test_html_render.py
index a94a1c45..df3b72fd 100644
--- a/xblocks_contrib/problem/capa/tests/test_html_render.py
+++ b/xblocks_contrib/problem/capa/tests/test_html_render.py
@@ -10,11 +10,11 @@
 import ddt
 from lxml import etree
 
+from xblocks_contrib.problem.capa.testing.codejail import UseUnsafeCodejail
 from xblocks_contrib.problem.capa.tests.helpers import mock_capa_system, new_loncapa_problem
-from xblocks_contrib.problem.capa.tests.test_util import UseUnsafeCodejail
 from xblocks_contrib.problem.markup import HTML
 
-from .response_xml_factory import CustomResponseXMLFactory, StringResponseXMLFactory
+from ..testing.response_xml_factory import CustomResponseXMLFactory, StringResponseXMLFactory
 
 
 @ddt.ddt
diff --git a/xblocks_contrib/problem/capa/tests/test_responsetypes.py b/xblocks_contrib/problem/capa/tests/test_responsetypes.py
index ebe56052..5f0ee1cb 100644
--- a/xblocks_contrib/problem/capa/tests/test_responsetypes.py
+++ b/xblocks_contrib/problem/capa/tests/test_responsetypes.py
@@ -21,8 +21,8 @@
 
 from xblocks_contrib.problem.capa.correctmap import CorrectMap
 from xblocks_contrib.problem.capa.responsetypes import LoncapaProblemError, ResponseError, StudentInputError
-from xblocks_contrib.problem.capa.tests.helpers import load_fixture, mock_capa_system, new_loncapa_problem
-from xblocks_contrib.problem.capa.tests.response_xml_factory import (
+from xblocks_contrib.problem.capa.testing.codejail import UseUnsafeCodejail
+from xblocks_contrib.problem.capa.testing.response_xml_factory import (
     AnnotationResponseXMLFactory,
     ChoiceResponseXMLFactory,
     ChoiceTextResponseXMLFactory,
@@ -38,7 +38,7 @@
     SymbolicResponseXMLFactory,
     TrueFalseResponseXMLFactory,
 )
-from xblocks_contrib.problem.capa.tests.test_util import UseUnsafeCodejail
+from xblocks_contrib.problem.capa.tests.helpers import load_fixture, mock_capa_system, new_loncapa_problem
 from xblocks_contrib.problem.capa.util import convert_files_to_filenames
 from xblocks_contrib.problem.capa.xqueue_interface import DATEFORMAT
 
diff --git a/xblocks_contrib/problem/capa/tests/test_util.py b/xblocks_contrib/problem/capa/tests/test_util.py
index 683a0e0a..6e9ee901 100644
--- a/xblocks_contrib/problem/capa/tests/test_util.py
+++ b/xblocks_contrib/problem/capa/tests/test_util.py
@@ -4,9 +4,7 @@
 
 import unittest
 
-import codejail.safe_exec
 import ddt
-from django.test.utils import TestContextDecorator
 from lxml import etree
 
 from xblocks_contrib.problem.capa.tests.helpers import mock_capa_system
@@ -167,30 +165,3 @@ def test_contextualize_text_with_non_ascii_context(self):
         expected_text = "$あなたあなたあなたあなた あなたhi"
         contextual_text = contextualize_text(text, context)
         assert expected_text == contextual_text
-
-
-class UseUnsafeCodejail(TestContextDecorator):
-    """
-    Tell codejail to run in unsafe mode for the scope of the decorator.
-    Use this as a decorator on Django TestCase classes or methods.
-
-    This is needed because codejail has significant OS-level setup requirements
-    which we don't even attempt to fulfill for unit testing purposes. Running
-    tests in unsafe mode (that is, running code executions in-process, with no
-    sandboxing) is only safe because we control the contents of the unit tests.
-    It's not a perfect replica of how safe mode operates but it's generally good
-    enough for testing the integration and overall behavior.
-    """
-
-    def __init__(self):
-        self.old_be_unsafe = None
-        super().__init__()
-
-    def enable(self):
-        """Enable unsafe mode for codejail within the test scope."""
-        self.old_be_unsafe = codejail.safe_exec.ALWAYS_BE_UNSAFE
-        codejail.safe_exec.ALWAYS_BE_UNSAFE = True
-
-    def disable(self):
-        """Restore the previous codejail unsafe mode state."""
-        codejail.safe_exec.ALWAYS_BE_UNSAFE = self.old_be_unsafe
diff --git a/xblocks_contrib/problem/tests/test_capa_block.py b/xblocks_contrib/problem/tests/test_capa_block.py
index 1af4f92a..0220683d 100644
--- a/xblocks_contrib/problem/tests/test_capa_block.py
+++ b/xblocks_contrib/problem/tests/test_capa_block.py
@@ -31,7 +31,7 @@
 from xblocks_contrib.problem.capa import responsetypes
 from xblocks_contrib.problem.capa.correctmap import CorrectMap
 from xblocks_contrib.problem.capa.responsetypes import LoncapaProblemError, ResponseError, StudentInputError
-from xblocks_contrib.problem.capa.tests.test_util import UseUnsafeCodejail
+from xblocks_contrib.problem.capa.testing.codejail import UseUnsafeCodejail
 from xblocks_contrib.problem.capa.xqueue_interface import XQueueInterface
 from xblocks_contrib.problem.capa_block import ComplexEncoder, ProblemBlock
 from xblocks_contrib.problem.tests import DATA_DIR