diff --git a/swh/lister/arch/tests/test_lister.py b/swh/lister/arch/tests/test_lister.py
--- a/swh/lister/arch/tests/test_lister.py
+++ b/swh/lister/arch/tests/test_lister.py
@@ -1373,28 +1373,22 @@
     assert res.pages == 9
     assert res.origins == 12
 
-    expected_origins_sorted = sorted(expected_origins, key=lambda x: x.get("url"))
-    scheduler_origins_sorted = sorted(
-        swh_scheduler.get_listed_origins(lister.lister_obj.id).results,
-        key=lambda x: x.url,
-    )
-
-    assert len(scheduler_origins_sorted) == len(expected_origins_sorted)
+    scheduler_origins = swh_scheduler.get_listed_origins(lister.lister_obj.id).results
 
     assert [
         (
             scheduled.visit_type,
             scheduled.url,
-            scheduled.extra_loader_arguments.get("artifacts"),
-            scheduled.extra_loader_arguments.get("arch_metadata"),
+            scheduled.extra_loader_arguments["artifacts"],
+            scheduled.extra_loader_arguments["arch_metadata"],
         )
-        for scheduled in scheduler_origins_sorted
+        for scheduled in sorted(scheduler_origins, key=lambda scheduled: scheduled.url)
     ] == [
         (
             "arch",
-            expected.get("url"),
-            expected.get("extra_loader_arguments").get("artifacts"),
-            expected.get("extra_loader_arguments").get("arch_metadata"),
+            expected["url"],
+            expected["extra_loader_arguments"]["artifacts"],
+            expected["extra_loader_arguments"]["arch_metadata"],
         )
-        for expected in expected_origins_sorted
+        for expected in sorted(expected_origins, key=lambda expected: expected["url"])
     ]
diff --git a/swh/lister/aur/tests/test_lister.py b/swh/lister/aur/tests/test_lister.py
--- a/swh/lister/aur/tests/test_lister.py
+++ b/swh/lister/aur/tests/test_lister.py
@@ -99,28 +99,22 @@
     assert res.pages == 4
     assert res.origins == 4
 
-    scheduler_origins_sorted = sorted(
-        swh_scheduler.get_listed_origins(lister.lister_obj.id).results,
-        key=lambda x: x.url,
-    )
-    expected_origins_sorted = sorted(expected_origins, key=lambda x: x.get("url"))
-
-    assert len(scheduler_origins_sorted) == len(expected_origins_sorted)
+    scheduler_origins = swh_scheduler.get_listed_origins(lister.lister_obj.id).results
 
     assert [
         (
             scheduled.visit_type,
             scheduled.url,
-            scheduled.extra_loader_arguments.get("artifacts"),
+            scheduled.extra_loader_arguments["artifacts"],
         )
-        for scheduled in scheduler_origins_sorted
+        for scheduled in sorted(scheduler_origins, key=lambda scheduled: scheduled.url)
     ] == [
         (
             "aur",
-            expected.get("url"),
-            expected.get("extra_loader_arguments").get("artifacts"),
+            expected["url"],
+            expected["extra_loader_arguments"]["artifacts"],
         )
-        for expected in expected_origins_sorted
+        for expected in sorted(expected_origins, key=lambda expected: expected["url"])
     ]
 
 
diff --git a/swh/lister/bitbucket/tests/test_lister.py b/swh/lister/bitbucket/tests/test_lister.py
--- a/swh/lister/bitbucket/tests/test_lister.py
+++ b/swh/lister/bitbucket/tests/test_lister.py
@@ -29,15 +29,9 @@
 def _check_listed_origins(lister_origins, scheduler_origins):
     """Asserts that the two collections have the same origins from the point of view of
     the lister"""
-
-    sorted_lister_origins = list(sorted(lister_origins))
-    sorted_scheduler_origins = list(sorted(scheduler_origins))
-
-    assert len(sorted_lister_origins) == len(sorted_scheduler_origins)
-
-    for lo, so in zip(sorted_lister_origins, sorted_scheduler_origins):
-        assert lo.url == so.url
-        assert lo.last_update == so.last_update
+    assert {(lo.url, lo.last_update) for lo in lister_origins} == {
+        (so.url, so.last_update) for so in scheduler_origins
+    }
 
 
 def test_bitbucket_incremental_lister(
diff --git a/swh/lister/crates/tests/test_lister.py b/swh/lister/crates/tests/test_lister.py
--- a/swh/lister/crates/tests/test_lister.py
+++ b/swh/lister/crates/tests/test_lister.py
@@ -137,20 +137,22 @@
     assert res.pages == 3
     assert res.origins == 3
 
-    expected_origins_sorted = sorted(expected_origins, key=lambda x: x.get("url"))
-    scheduler_origins_sorted = sorted(
-        swh_scheduler.get_listed_origins(lister.lister_obj.id).results,
-        key=lambda x: x.url,
-    )
-
-    for scheduled, expected in zip(scheduler_origins_sorted, expected_origins_sorted):
-        assert scheduled.visit_type == "crates"
-        assert scheduled.url == expected.get("url")
-        assert scheduled.extra_loader_arguments.get("artifacts") == expected.get(
-            "artifacts"
+    scheduler_origins = swh_scheduler.get_listed_origins(lister.lister_obj.id).results
+    assert [
+        (
+            scheduled.visit_type,
+            scheduled.url,
+            scheduled.extra_loader_arguments["artifacts"],
         )
-
-    assert len(scheduler_origins_sorted) == len(expected_origins_sorted)
+        for scheduled in sorted(scheduler_origins, key=lambda scheduled: scheduled.url)
+    ] == [
+        (
+            "crates",
+            expected["url"],
+            expected["artifacts"],
+        )
+        for expected in sorted(expected_origins, key=lambda expected: expected["url"])
+    ]
 
 
 def test_crates_lister_incremental(datadir, tmp_path, swh_scheduler):
@@ -176,22 +178,24 @@
     assert res.pages == 2
     assert res.origins == 2
 
-    expected_origins_sorted = sorted(
-        expected_origins_incremental, key=lambda x: x.get("url")
-    )
-    scheduler_origins_sorted = sorted(
-        swh_scheduler.get_listed_origins(lister.lister_obj.id).results,
-        key=lambda x: x.url,
-    )
-
-    for scheduled, expected in zip(scheduler_origins_sorted, expected_origins_sorted):
-        assert scheduled.visit_type == "crates"
-        assert scheduled.url == expected.get("url")
-        assert scheduled.extra_loader_arguments.get("artifacts") == expected.get(
-            "artifacts"
+    scheduler_origins = swh_scheduler.get_listed_origins(lister.lister_obj.id).results
+    assert [
+        (
+            scheduled.visit_type,
+            scheduled.url,
+            scheduled.extra_loader_arguments["artifacts"],
         )
-
-    assert len(scheduler_origins_sorted) == len(expected_origins_sorted)
+        for scheduled in sorted(scheduler_origins, key=lambda scheduled: scheduled.url)
+    ] == [
+        (
+            "crates",
+            expected["url"],
+            expected["artifacts"],
+        )
+        for expected in sorted(
+            expected_origins_incremental, key=lambda expected: expected["url"]
+        )
+    ]
 
 
 def test_crates_lister_incremental_nothing_new(datadir, tmp_path, swh_scheduler):
diff --git a/swh/lister/gitea/tests/test_lister.py b/swh/lister/gitea/tests/test_lister.py
--- a/swh/lister/gitea/tests/test_lister.py
+++ b/swh/lister/gitea/tests/test_lister.py
@@ -51,14 +51,7 @@
     """Asserts that the two collections have the same origin URLs.
 
     Does not test last_update."""
-
-    sorted_lister_urls = list(sorted(lister_urls))
-    sorted_scheduler_origins = list(sorted(scheduler_origins))
-
-    assert len(sorted_lister_urls) == len(sorted_scheduler_origins)
-
-    for l_url, s_origin in zip(sorted_lister_urls, sorted_scheduler_origins):
-        assert l_url == s_origin.url
+    assert set(lister_urls) == {origin.url for origin in scheduler_origins}
 
 
 def test_gitea_full_listing(
diff --git a/swh/lister/gogs/tests/test_lister.py b/swh/lister/gogs/tests/test_lister.py
--- a/swh/lister/gogs/tests/test_lister.py
+++ b/swh/lister/gogs/tests/test_lister.py
@@ -96,14 +96,7 @@
     """Asserts that the two collections have the same origin URLs.
 
     Does not test last_update."""
-
-    sorted_lister_urls = list(sorted(lister_urls))
-    sorted_scheduler_origins = list(sorted(scheduler_origins))
-
-    assert len(sorted_lister_urls) == len(sorted_scheduler_origins)
-
-    for l_url, s_origin in zip(sorted_lister_urls, sorted_scheduler_origins):
-        assert l_url == s_origin.url
+    assert set(lister_urls) == {origin.url for origin in scheduler_origins}
 
 
 def test_gogs_full_listing(
diff --git a/swh/lister/pypi/tests/test_lister.py b/swh/lister/pypi/tests/test_lister.py
--- a/swh/lister/pypi/tests/test_lister.py
+++ b/swh/lister/pypi/tests/test_lister.py
@@ -16,14 +16,7 @@
 
 def check_listed_origins(lister_urls: List[str], scheduler_origins: List[ListedOrigin]):
     """Asserts that the two collections have the same origin URLs"""
-
-    sorted_lister_urls = list(sorted(lister_urls))
-    sorted_scheduler_origins = list(sorted(scheduler_origins))
-
-    assert len(sorted_lister_urls) == len(sorted_scheduler_origins)
-
-    for l_url, s_origin in zip(sorted_lister_urls, sorted_scheduler_origins):
-        assert l_url == s_origin.url
+    assert set(lister_urls) == {origin.url for origin in scheduler_origins}
 
 
 @pytest.mark.parametrize(
diff --git a/swh/lister/tuleap/tests/test_lister.py b/swh/lister/tuleap/tests/test_lister.py
--- a/swh/lister/tuleap/tests/test_lister.py
+++ b/swh/lister/tuleap/tests/test_lister.py
@@ -97,13 +97,7 @@
 
     Does not test last_update."""
 
-    sorted_lister_urls = list(sorted(lister_urls))
-    sorted_scheduler_origins = list(sorted(scheduler_origins))
-
-    assert len(sorted_lister_urls) == len(sorted_scheduler_origins)
-
-    for l_url, s_origin in zip(sorted_lister_urls, sorted_scheduler_origins):
-        assert l_url == s_origin.url
+    assert set(lister_urls) == {origin.url for origin in scheduler_origins}
 
 
 def test_tuleap_full_listing(