diff --git a/src/rez/tests/test_context.py b/src/rez/tests/test_context.py
index dc1b4a254..225f08e46 100644
--- a/src/rez/tests/test_context.py
+++ b/src/rez/tests/test_context.py
@@ -5,16 +5,20 @@
 """
 test resolved contexts
 """
+import sys
+
 from rez.tests.util import restore_os_environ, restore_sys_path, TempdirMixin, \
     TestBase
 from rez.resolved_context import get_lock_request, PatchLock, ResolvedContext
 from rez.bundle_context import bundle_context
 from rez.bind import hello_world
+from rez.solver import SolverCallbackReturn, SolverState
 from rez.utils.platform_ import platform_
 from rez.utils.filesystem import is_subdirectory
 from rez.utils.formatting import PackageRequest
 from rez.version import Version
 import unittest
+import unittest.mock
 import subprocess
 import platform
 import shutil
@@ -252,6 +256,39 @@ def test_orderer_package_argument(self):
         resolved = [x.qualified_package_name for x in r.resolved_packages]
         self.assertEqual(resolved, ['python-2.7.0'])
 
+    def test_callback_1(self):
+        def solver_callback(solver_state: SolverState):
+            if solver_state.num_fails > 999:
+                solver_callback_return = SolverCallbackReturn.fail
+                abort_reason = 'Too many fails'
+            else:
+                solver_callback_return = SolverCallbackReturn.keep_going
+                abort_reason = 'No reason'
+            return solver_callback_return, abort_reason
+
+        callback = ResolvedContext.Callback(max_fails=1, time_limit=2, callback=solver_callback, buf=sys.stdout)
+        solve_state = SolverState(3, 1, None)
+        callback_result = callback(solve_state)
+        assert callback_result[0] == SolverCallbackReturn.fail
+
+    def test_callback_2(self):
+        def solver_callback(solver_state: SolverState):
+            if solver_state.num_fails > 999:
+                solver_callback_return = SolverCallbackReturn.fail
+                abort_reason = 'Too many fails'
+            else:
+                solver_callback_return = SolverCallbackReturn.keep_going
+                abort_reason = 'No reason'
+            return solver_callback_return, abort_reason
+
+        callback = ResolvedContext.Callback(max_fails=999, time_limit=0, callback=solver_callback, buf=sys.stdout)
+        solve_state = SolverState(3, 1, None)
+        # Mock start time to be Jan 1, 1970.
+        with unittest.mock.patch('rez.resolved_context.ResolvedContext.Callback.start_time',
+                                        new_callable=unittest.mock.PropertyMock, return_value=0):
+            callback_result = callback(solve_state)
+            assert callback_result[0] == SolverCallbackReturn.abort
+
     def test_get_lock_request_1(self):
         pkg = 'foo'
         version = Version('1.2.1')