diff --git a/jobserver/views/job_requests.py b/jobserver/views/job_requests.py
index 1361fcebf..c43da9b4e 100644
--- a/jobserver/views/job_requests.py
+++ b/jobserver/views/job_requests.py
@@ -50,6 +50,8 @@ def post(self, request, *args, **kwargs):
         job_request.cancelled_actions = actions
         job_request.save()
 
+        messages.success(request, "The requested actions have been cancelled")
+
         return redirect(job_request)
 
 
diff --git a/jobserver/views/jobs.py b/jobserver/views/jobs.py
index b067ec6c0..859c640b1 100644
--- a/jobserver/views/jobs.py
+++ b/jobserver/views/jobs.py
@@ -1,5 +1,6 @@
 import os
 
+from django.contrib import messages
 from django.core.exceptions import MultipleObjectsReturned
 from django.http import Http404
 from django.shortcuts import get_object_or_404, redirect
@@ -27,6 +28,11 @@ def post(self, request, *args, **kwargs):
 
         job.job_request.cancelled_actions.append(job.action)
         job.job_request.save()
+
+        messages.success(
+            request, f'Your request to cancel "{job.action}" was successful'
+        )
+
         return redirect(job)
 
 
diff --git a/tests/unit/jobserver/views/test_job_requests.py b/tests/unit/jobserver/views/test_job_requests.py
index 551aca972..eaa524ec6 100644
--- a/tests/unit/jobserver/views/test_job_requests.py
+++ b/tests/unit/jobserver/views/test_job_requests.py
@@ -66,6 +66,10 @@ def test_jobrequestcancel_success(rf):
     request = rf.post("/")
     request.user = user
 
+    request.session = "session"
+    messages = FallbackStorage(request)
+    request._messages = messages
+
     response = JobRequestCancel.as_view()(request, pk=job_request.pk)
 
     assert response.status_code == 302
@@ -76,6 +80,10 @@ def test_jobrequestcancel_success(rf):
     assert "test2" in job_request.cancelled_actions
     assert "test3" in job_request.cancelled_actions
 
+    messages = list(messages)
+    assert len(messages) == 1
+    assert str(messages[0]) == "The requested actions have been cancelled"
+
 
 def test_jobrequestcancel_partially_completed(rf):
     job_request = JobRequestFactory(cancelled_actions=[])
@@ -93,6 +101,10 @@ def test_jobrequestcancel_partially_completed(rf):
     request = rf.post("/")
     request.user = user
 
+    request.session = "session"
+    messages = FallbackStorage(request)
+    request._messages = messages
+
     response = JobRequestCancel.as_view()(request, pk=job_request.pk)
 
     assert response.status_code == 302
@@ -101,6 +113,10 @@ def test_jobrequestcancel_partially_completed(rf):
     job_request.refresh_from_db()
     assert sorted(job_request.cancelled_actions) == ["test3", "test4"]
 
+    messages = list(messages)
+    assert len(messages) == 1
+    assert str(messages[0]) == "The requested actions have been cancelled"
+
 
 def test_jobrequestcancel_with_job_request_creator(rf):
     user = UserFactory()
@@ -110,6 +126,10 @@ def test_jobrequestcancel_with_job_request_creator(rf):
     request = rf.post("/")
     request.user = user
 
+    request.session = "session"
+    messages = FallbackStorage(request)
+    request._messages = messages
+
     response = JobRequestCancel.as_view()(request, pk=job_request.pk)
 
     assert response.status_code == 302
@@ -118,6 +138,10 @@ def test_jobrequestcancel_with_job_request_creator(rf):
     job_request.refresh_from_db()
     assert "test1" in job_request.cancelled_actions
 
+    messages = list(messages)
+    assert len(messages) == 1
+    assert str(messages[0]) == "The requested actions have been cancelled"
+
 
 def test_jobrequestcancel_unauthorized(rf):
     job_request = JobRequestFactory()
diff --git a/tests/unit/jobserver/views/test_jobs.py b/tests/unit/jobserver/views/test_jobs.py
index 55db0c448..8145eb15f 100644
--- a/tests/unit/jobserver/views/test_jobs.py
+++ b/tests/unit/jobserver/views/test_jobs.py
@@ -1,5 +1,6 @@
 import pytest
 from django.contrib.auth.models import AnonymousUser
+from django.contrib.messages.storage.fallback import FallbackStorage
 from django.http import Http404
 from django.utils import timezone
 
@@ -69,6 +70,10 @@ def test_jobcancel_success(rf):
     request = rf.post("/")
     request.user = user
 
+    request.session = "session"
+    messages = FallbackStorage(request)
+    request._messages = messages
+
     response = JobCancel.as_view()(request, identifier=job.identifier)
 
     assert response.status_code == 302
@@ -77,6 +82,10 @@ def test_jobcancel_success(rf):
     job_request.refresh_from_db()
     assert job_request.cancelled_actions == ["test"]
 
+    messages = list(messages)
+    assert len(messages) == 1
+    assert str(messages[0]) == 'Your request to cancel "test" was successful'
+
 
 def test_jobcancel_with_job_creator(rf):
     user = UserFactory()
@@ -86,6 +95,10 @@ def test_jobcancel_with_job_creator(rf):
     request = rf.post("/")
     request.user = user
 
+    request.session = "session"
+    messages = FallbackStorage(request)
+    request._messages = messages
+
     response = JobCancel.as_view()(request, identifier=job.identifier)
 
     assert response.status_code == 302
@@ -94,6 +107,10 @@ def test_jobcancel_with_job_creator(rf):
     job_request.refresh_from_db()
     assert job_request.cancelled_actions == ["test"]
 
+    messages = list(messages)
+    assert len(messages) == 1
+    assert str(messages[0]) == 'Your request to cancel "test" was successful'
+
 
 def test_jobcancel_without_permission(rf, user):
     job = JobFactory(job_request=JobRequestFactory())