diff --git a/pageserver/src/tenant_tasks.rs b/pageserver/src/tenant_tasks.rs
index a24bdd5812..5a9c5aa3a5 100644
--- a/pageserver/src/tenant_tasks.rs
+++ b/pageserver/src/tenant_tasks.rs
@@ -72,8 +72,6 @@ async fn compaction_loop(tenant_id: TenantId) {
             if let Err(e) = tenant.compaction_iteration() {
                 sleep_duration = wait_duration;
                 error!("Compaction failed, retrying in {:?}: {e:#}", sleep_duration);
-                #[cfg(feature = "testing")]
-                std::process::abort();
             }
 
             // Sleep
@@ -123,8 +121,6 @@ async fn gc_loop(tenant_id: TenantId) {
                 {
                     sleep_duration = wait_duration;
                     error!("Gc failed, retrying in {:?}: {e:#}", sleep_duration);
-                    #[cfg(feature = "testing")]
-                    std::process::abort();
                 }
             }
 
diff --git a/test_runner/fixtures/neon_fixtures.py b/test_runner/fixtures/neon_fixtures.py
index f68c6a25db..051c140836 100644
--- a/test_runner/fixtures/neon_fixtures.py
+++ b/test_runner/fixtures/neon_fixtures.py
@@ -784,6 +784,8 @@ class NeonEnvBuilder:
 
             self.cleanup_remote_storage()
 
+            self.env.pageserver.assert_no_errors()
+
 
 class NeonEnv:
     """
@@ -1723,6 +1725,43 @@ class NeonPageserver(PgProtocol):
         self.config_override = config_override
         self.version = env.get_pageserver_version()
 
+        # After a test finishes, we will scrape the log to see if there are any
+        # unexpected error messages. If your test expects an error, add it to
+        # 'allowed_errors' in the test with something like:
+        #
+        # env.pageserver.allowed_errors.append(".*could not open garage door.*")
+        #
+        # The entries in the list are regular experessions.
+        self.allowed_errors = [
+            # All tests print these, when starting up or shutting down
+            ".*wal receiver task finished with an error: walreceiver connection handling failure.*",
+            ".*Shutdown task error: walreceiver connection handling failure.*",
+            ".*Etcd client error: grpc request error: status: Unavailable.*",
+            ".*query handler for .* failed: Connection reset by peer.*",
+            ".*serving compute connection task.*exited with error: Broken pipe.*",
+            ".*Connection aborted: error communicating with the server: Broken pipe.*",
+            ".*Connection aborted: error communicating with the server: Transport endpoint is not connected.*",
+            ".*Connection aborted: error communicating with the server: Connection reset by peer.*",
+            ".*kill_and_wait_impl.*: wait successful.*",
+            ".*end streaming to Some.*",
+            # safekeeper connection can fail with this, in the window between timeline creation
+            # and streaming start
+            ".*Failed to process query for timeline .*: state uninitialized, no data to read.*",
+            # Tests related to authentication and authorization print these
+            ".*Error processing HTTP request: Forbidden",
+            # intentional failpoints
+            ".*failpoint ",
+            # FIXME: there is a race condition between GC and detach, see
+            # https://github.com/neondatabase/neon/issues/2442
+            ".*could not remove ephemeral file.*No such file or directory.*",
+            # FIXME: These need investigation
+            ".*gc_loop.*Failed to get a tenant .* Tenant .* not found in the local state.*",
+            ".*compaction_loop.*Failed to get a tenant .* Tenant .* not found in the local state.*",
+            ".*manual_gc.*is_shutdown_requested\\(\\) called in an unexpected task or thread.*",
+            ".*tenant_list: timeline is not found in remote index while it is present in the tenants registry.*",
+            ".*Removing intermediate uninit mark file.*",
+        ]
+
     def start(self, overrides: Tuple[str, ...] = ()) -> "NeonPageserver":
         """
         Start the page server.
@@ -1771,6 +1810,26 @@ class NeonPageserver(PgProtocol):
             is_testing_enabled_or_skip=self.is_testing_enabled_or_skip,
         )
 
+    def assert_no_errors(self):
+        logfile = open(os.path.join(self.env.repo_dir, "pageserver.log"), "r")
+
+        error_or_warn = re.compile("ERROR|WARN")
+        errors = []
+        while True:
+            line = logfile.readline()
+            if not line:
+                break
+
+            if error_or_warn.search(line):
+                # It's an ERROR or WARN. Is it in the allow-list?
+                for a in self.allowed_errors:
+                    if re.match(a, line):
+                        break
+                else:
+                    errors.append(line)
+
+        assert not errors
+
 
 def append_pageserver_param_overrides(
     params_to_update: List[str],
diff --git a/test_runner/regress/test_branch_and_gc.py b/test_runner/regress/test_branch_and_gc.py
index 12debe50eb..fad4b4c79e 100644
--- a/test_runner/regress/test_branch_and_gc.py
+++ b/test_runner/regress/test_branch_and_gc.py
@@ -116,6 +116,13 @@ def test_branch_creation_before_gc(neon_simple_env: NeonEnv):
     env = neon_simple_env
     pageserver_http_client = env.pageserver.http_client()
 
+    env.pageserver.allowed_errors.extend(
+        [
+            ".*invalid branch start lsn: less than latest GC cutoff.*",
+            ".*invalid branch start lsn: less than planned GC cutoff.*",
+        ]
+    )
+
     # Disable background GC but set the `pitr_interval` to be small, so GC can delete something
     tenant, _ = env.neon_cli.create_tenant(
         conf={
diff --git a/test_runner/regress/test_branch_behind.py b/test_runner/regress/test_branch_behind.py
index 0e2a8b346b..a841e3ced2 100644
--- a/test_runner/regress/test_branch_behind.py
+++ b/test_runner/regress/test_branch_behind.py
@@ -13,6 +13,9 @@ def test_branch_behind(neon_env_builder: NeonEnvBuilder):
     neon_env_builder.pageserver_config_override = "tenant_config={pitr_interval = '0 sec'}"
     env = neon_env_builder.init_start()
 
+    env.pageserver.allowed_errors.append(".*invalid branch start lsn.*")
+    env.pageserver.allowed_errors.append(".*invalid start lsn .* for ancestor timeline.*")
+
     # Branch at the point where only 100 rows were inserted
     env.neon_cli.create_branch("test_branch_behind")
     pgmain = env.postgres.create_start("test_branch_behind")
diff --git a/test_runner/regress/test_broken_timeline.py b/test_runner/regress/test_broken_timeline.py
index b747af4d09..cf7f4b8289 100644
--- a/test_runner/regress/test_broken_timeline.py
+++ b/test_runner/regress/test_broken_timeline.py
@@ -11,10 +11,17 @@ from fixtures.types import TenantId, TimelineId
 # Test restarting page server, while safekeeper and compute node keep
 # running.
 def test_broken_timeline(neon_env_builder: NeonEnvBuilder):
-    # One safekeeper is enough for this test.
-    neon_env_builder.num_safekeepers = 3
     env = neon_env_builder.init_start()
 
+    env.pageserver.allowed_errors.extend(
+        [
+            ".*No timelines to attach received.*",
+            ".*Failed to process timeline dir contents.*",
+            ".*Failed to load delta layer.*",
+            ".*Timeline .* was not found.*",
+        ]
+    )
+
     tenant_timelines: List[Tuple[TenantId, TimelineId, Postgres]] = []
 
     for n in range(4):
@@ -111,6 +118,13 @@ def test_timeline_init_break_before_checkpoint(neon_simple_env: NeonEnv):
     env = neon_simple_env
     pageserver_http = env.pageserver.http_client()
 
+    env.pageserver.allowed_errors.extend(
+        [
+            ".*Failed to process timeline dir contents.*Timeline has no ancestor and no layer files.*",
+            ".*Timeline got dropped without initializing, cleaning its files.*",
+        ]
+    )
+
     tenant_id, _ = env.neon_cli.create_tenant()
 
     timelines_dir = env.repo_dir / "tenants" / str(tenant_id) / "timelines"
diff --git a/test_runner/regress/test_compatibility.py b/test_runner/regress/test_compatibility.py
index 306aa84040..9ad8cd393f 100644
--- a/test_runner/regress/test_compatibility.py
+++ b/test_runner/regress/test_compatibility.py
@@ -50,6 +50,12 @@ def test_create_snapshot(neon_env_builder: NeonEnvBuilder, pg_bin: PgBin, test_o
 
     env = neon_env_builder.init_start()
     pg = env.postgres.create_start("main")
+
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     pg_bin.run(["pgbench", "--initialize", "--scale=10", pg.connstr()])
     pg_bin.run(["pgbench", "--time=60", "--progress=2", pg.connstr()])
     pg_bin.run(["pg_dumpall", f"--dbname={pg.connstr()}", f"--file={test_output_dir / 'dump.sql'}"])
diff --git a/test_runner/regress/test_gc_cutoff.py b/test_runner/regress/test_gc_cutoff.py
index 22b77d2cf1..7fe77a7e85 100644
--- a/test_runner/regress/test_gc_cutoff.py
+++ b/test_runner/regress/test_gc_cutoff.py
@@ -9,6 +9,11 @@ from fixtures.neon_fixtures import NeonEnvBuilder, PgBin
 # test anyway, so it doesn't need any special attention here.
 def test_gc_cutoff(neon_env_builder: NeonEnvBuilder, pg_bin: PgBin):
     env = neon_env_builder.init_start()
+
+    # These warnings are expected, when the pageserver is restarted abruptly
+    env.pageserver.allowed_errors.append(".*found future image layer.*")
+    env.pageserver.allowed_errors.append(".*found future delta layer.*")
+
     pageserver_http = env.pageserver.http_client()
 
     # Use aggressive GC and checkpoint settings, so that we also exercise GC during the test
diff --git a/test_runner/regress/test_import.py b/test_runner/regress/test_import.py
index ced5e18406..fbc893f312 100644
--- a/test_runner/regress/test_import.py
+++ b/test_runner/regress/test_import.py
@@ -76,6 +76,26 @@ def test_import_from_vanilla(test_output_dir, pg_bin, vanilla_pg, neon_env_build
     env = neon_env_builder.init_start()
     env.pageserver.http_client().tenant_create(tenant)
 
+    env.pageserver.allowed_errors.extend(
+        [
+            ".*error importing base backup .*",
+            ".*Timeline got dropped without initializing, cleaning its files.*",
+            ".*Removing intermediate uninit mark file.*",
+            ".*InternalServerError.*timeline not found.*",
+            ".*InternalServerError.*Tenant .* not found.*",
+            ".*InternalServerError.*Timeline .* not found.*",
+            ".*InternalServerError.*Cannot delete timeline which has child timelines.*",
+        ]
+    )
+
+    # FIXME: we should clean up pageserver to not print this
+    env.pageserver.allowed_errors.append(".*exited with error: unexpected message type: CopyData.*")
+
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     def import_tar(base, wal):
         env.neon_cli.raw_cli(
             [
@@ -122,6 +142,11 @@ def test_import_from_pageserver_small(pg_bin: PgBin, neon_env_builder: NeonEnvBu
     neon_env_builder.enable_local_fs_remote_storage()
     env = neon_env_builder.init_start()
 
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     timeline = env.neon_cli.create_branch("test_import_from_pageserver_small")
     pg = env.postgres.create_start("test_import_from_pageserver_small")
 
diff --git a/test_runner/regress/test_pageserver_restart.py b/test_runner/regress/test_pageserver_restart.py
index eac5e6e61d..ad06634ae9 100644
--- a/test_runner/regress/test_pageserver_restart.py
+++ b/test_runner/regress/test_pageserver_restart.py
@@ -67,6 +67,10 @@ def test_pageserver_restart(neon_env_builder: NeonEnvBuilder):
 def test_pageserver_chaos(neon_env_builder: NeonEnvBuilder):
     env = neon_env_builder.init_start()
 
+    # These warnings are expected, when the pageserver is restarted abruptly
+    env.pageserver.allowed_errors.append(".*found future image layer.*")
+    env.pageserver.allowed_errors.append(".*found future delta layer.*")
+
     # Use a tiny checkpoint distance, to create a lot of layers quickly.
     # That allows us to stress the compaction and layer flushing logic more.
     tenant, _ = env.neon_cli.create_tenant(
diff --git a/test_runner/regress/test_read_validation.py b/test_runner/regress/test_read_validation.py
index beaae0351b..1e49c3b69f 100644
--- a/test_runner/regress/test_read_validation.py
+++ b/test_runner/regress/test_read_validation.py
@@ -143,6 +143,8 @@ def test_read_validation_neg(neon_simple_env: NeonEnv):
     env = neon_simple_env
     env.neon_cli.create_branch("test_read_validation_neg", "empty")
 
+    env.pageserver.allowed_errors.append(".*invalid LSN\\(0\\) in request.*")
+
     pg = env.postgres.create_start("test_read_validation_neg")
     log.info("postgres is running on 'test_read_validation_neg' branch")
 
diff --git a/test_runner/regress/test_readonly_node.py b/test_runner/regress/test_readonly_node.py
index dfa57aec25..62c3ead0a7 100644
--- a/test_runner/regress/test_readonly_node.py
+++ b/test_runner/regress/test_readonly_node.py
@@ -17,6 +17,8 @@ def test_readonly_node(neon_simple_env: NeonEnv):
     pgmain = env.postgres.create_start("test_readonly_node")
     log.info("postgres is running on 'test_readonly_node' branch")
 
+    env.pageserver.allowed_errors.append(".*basebackup .* failed: invalid basebackup lsn.*")
+
     main_pg_conn = pgmain.connect()
     main_cur = main_pg_conn.cursor()
 
diff --git a/test_runner/regress/test_recovery.py b/test_runner/regress/test_recovery.py
index e70b1351ba..1e93958e98 100644
--- a/test_runner/regress/test_recovery.py
+++ b/test_runner/regress/test_recovery.py
@@ -17,6 +17,10 @@ def test_pageserver_recovery(neon_env_builder: NeonEnvBuilder):
 
     neon_env_builder.start()
 
+    # These warnings are expected, when the pageserver is restarted abruptly
+    env.pageserver.allowed_errors.append(".*found future delta layer.*")
+    env.pageserver.allowed_errors.append(".*found future image layer.*")
+
     # Create a branch for us
     env.neon_cli.create_branch("test_pageserver_recovery", "main")
 
diff --git a/test_runner/regress/test_remote_storage.py b/test_runner/regress/test_remote_storage.py
index 4fb5a5406d..ecca496c7c 100644
--- a/test_runner/regress/test_remote_storage.py
+++ b/test_runner/regress/test_remote_storage.py
@@ -56,6 +56,17 @@ def test_remote_storage_backup_and_restore(
 
     ##### First start, insert secret data and upload it to the remote storage
     env = neon_env_builder.init_start()
+
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+    env.pageserver.allowed_errors.append(".*No timelines to attach received.*")
+
+    env.pageserver.allowed_errors.append(".*Tenant download is already in progress.*")
+    env.pageserver.allowed_errors.append(".*Failed to get local tenant state.*")
+    env.pageserver.allowed_errors.append(".*No metadata file found in the timeline directory.*")
+
     pageserver_http = env.pageserver.http_client()
     pg = env.postgres.create_start("main")
 
diff --git a/test_runner/regress/test_tenant_detach.py b/test_runner/regress/test_tenant_detach.py
index dc4cd2e37e..f66bacc4f7 100644
--- a/test_runner/regress/test_tenant_detach.py
+++ b/test_runner/regress/test_tenant_detach.py
@@ -20,6 +20,8 @@ def test_tenant_detach_smoke(neon_env_builder: NeonEnvBuilder):
     env = neon_env_builder.init_start()
     pageserver_http = env.pageserver.http_client()
 
+    env.pageserver.allowed_errors.append(".*NotFound\\(Tenant .* not found in the local state")
+
     # first check for non existing tenant
     tenant_id = TenantId.generate()
     with pytest.raises(
@@ -28,6 +30,9 @@ def test_tenant_detach_smoke(neon_env_builder: NeonEnvBuilder):
     ):
         pageserver_http.tenant_detach(tenant_id)
 
+    # the error will be printed to the log too
+    env.pageserver.allowed_errors.append(".*Tenant not found for id.*")
+
     # create new nenant
     tenant_id, timeline_id = env.neon_cli.create_tenant()
 
@@ -50,6 +55,9 @@ def test_tenant_detach_smoke(neon_env_builder: NeonEnvBuilder):
         bogus_timeline_id = TimelineId.generate()
         pageserver_http.timeline_gc(tenant_id, bogus_timeline_id, 0)
 
+        # the error will be printed to the log too
+    env.pageserver.allowed_errors.append(".*gc target timeline does not exist.*")
+
     # try to concurrently run gc and detach
     gc_thread = Thread(target=lambda: do_gc_target(pageserver_http, tenant_id, timeline_id))
     gc_thread.start()
diff --git a/test_runner/regress/test_tenant_relocation.py b/test_runner/regress/test_tenant_relocation.py
index aec45307f7..c4b3b28f34 100644
--- a/test_runner/regress/test_tenant_relocation.py
+++ b/test_runner/regress/test_tenant_relocation.py
@@ -259,6 +259,11 @@ def test_tenant_relocation(
 
     env = neon_env_builder.init_start()
 
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     # create folder for remote storage mock
     remote_storage_mock_path = env.repo_dir / "local_fs_remote_storage"
 
diff --git a/test_runner/regress/test_tenants.py b/test_runner/regress/test_tenants.py
index 4ffea60950..6d153b42bc 100644
--- a/test_runner/regress/test_tenants.py
+++ b/test_runner/regress/test_tenants.py
@@ -25,6 +25,13 @@ def test_tenant_creation_fails(neon_simple_env: NeonEnv):
     )
     initial_tenant_dirs = [d for d in tenants_dir.iterdir()]
 
+    neon_simple_env.pageserver.allowed_errors.extend(
+        [
+            ".*Failed to create directory structure for tenant .*, cleaning tmp data.*",
+            ".*Failed to fsync removed temporary tenant directory .*",
+        ]
+    )
+
     pageserver_http = neon_simple_env.pageserver.http_client()
     pageserver_http.configure_failpoints(("tenant-creation-before-tmp-rename", "return"))
     with pytest.raises(Exception, match="tenant-creation-before-tmp-rename"):
@@ -206,6 +213,13 @@ def test_pageserver_with_empty_tenants(
     )
 
     env = neon_env_builder.init_start()
+
+    env.pageserver.allowed_errors.append(
+        ".*marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+    env.pageserver.allowed_errors.append(".*Tenant .* has no timelines directory.*")
+    env.pageserver.allowed_errors.append(".*No timelines to attach received.*")
+
     client = env.pageserver.http_client()
 
     tenant_without_timelines_dir = env.initial_tenant
diff --git a/test_runner/regress/test_tenants_with_remote_storage.py b/test_runner/regress/test_tenants_with_remote_storage.py
index 9a4cbe135b..8fd28cf53e 100644
--- a/test_runner/regress/test_tenants_with_remote_storage.py
+++ b/test_runner/regress/test_tenants_with_remote_storage.py
@@ -66,6 +66,11 @@ def test_tenants_many(neon_env_builder: NeonEnvBuilder, remote_storage_kind: Rem
 
     env = neon_env_builder.init_start()
 
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     tenants_pgs: List[Tuple[TenantId, Postgres]] = []
 
     for _ in range(1, 5):
@@ -117,6 +122,13 @@ def test_tenants_attached_after_download(
 
     ##### First start, insert secret data and upload it to the remote storage
     env = neon_env_builder.init_start()
+
+    # FIXME: Are these expected?
+    env.pageserver.allowed_errors.append(".*No timelines to attach received.*")
+    env.pageserver.allowed_errors.append(
+        ".*marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     pageserver_http = env.pageserver.http_client()
     pg = env.postgres.create_start("main")
 
@@ -209,6 +221,16 @@ def test_tenant_upgrades_index_json_from_v0(
     # launch pageserver, populate the default tenants timeline, wait for it to be uploaded,
     # then go ahead and modify the "remote" version as if it was downgraded, needing upgrade
     env = neon_env_builder.init_start()
+
+    # FIXME: Are these expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+    env.pageserver.allowed_errors.append(".*No timelines to attach received.*")
+    env.pageserver.allowed_errors.append(
+        ".*Failed to get local tenant state: Tenant .* not found in the local state.*"
+    )
+
     pageserver_http = env.pageserver.http_client()
     pg = env.postgres.create_start("main")
 
@@ -315,6 +337,20 @@ def test_tenant_redownloads_truncated_file_on_startup(
     )
 
     env = neon_env_builder.init_start()
+
+    env.pageserver.allowed_errors.append(
+        ".*Redownloading locally existing .* due to size mismatch.*"
+    )
+    env.pageserver.allowed_errors.append(
+        ".*Downloaded layer exists already but layer file metadata mismatches.*"
+    )
+
+    # FIXME: Are these expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+    env.pageserver.allowed_errors.append(".*No timelines to attach received.*")
+
     pageserver_http = env.pageserver.http_client()
     pg = env.postgres.create_start("main")
 
diff --git a/test_runner/regress/test_timeline_delete.py b/test_runner/regress/test_timeline_delete.py
index 450f7f2381..d8f9ef2f89 100644
--- a/test_runner/regress/test_timeline_delete.py
+++ b/test_runner/regress/test_timeline_delete.py
@@ -7,6 +7,11 @@ from fixtures.utils import wait_until
 def test_timeline_delete(neon_simple_env: NeonEnv):
     env = neon_simple_env
 
+    env.pageserver.allowed_errors.append(".*Timeline .* was not found.*")
+    env.pageserver.allowed_errors.append(".*timeline not found.*")
+    env.pageserver.allowed_errors.append(".*Cannot delete timeline which has child timelines.*")
+    env.pageserver.allowed_errors.append(".*Tenant .* not found in the local state.*")
+
     ps_http = env.pageserver.http_client()
 
     # first try to delete non existing timeline
diff --git a/test_runner/regress/test_wal_acceptor.py b/test_runner/regress/test_wal_acceptor.py
index 2b43f46fd3..3945376e5e 100644
--- a/test_runner/regress/test_wal_acceptor.py
+++ b/test_runner/regress/test_wal_acceptor.py
@@ -263,6 +263,12 @@ def test_broker(neon_env_builder: NeonEnvBuilder):
     env = neon_env_builder.init_start()
 
     env.neon_cli.create_branch("test_broker", "main")
+
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     pg = env.postgres.create_start("test_broker")
     pg.safe_psql("CREATE TABLE t(key int primary key, value text)")
 
@@ -306,6 +312,11 @@ def test_wal_removal(neon_env_builder: NeonEnvBuilder, auth_enabled: bool):
     neon_env_builder.auth_enabled = auth_enabled
     env = neon_env_builder.init_start()
 
+    # FIXME: Is this expected?
+    env.pageserver.allowed_errors.append(
+        ".*init_tenant_mgr: marking .* as locally complete, while it doesnt exist in remote index.*"
+    )
+
     env.neon_cli.create_branch("test_safekeepers_wal_removal")
     pg = env.postgres.create_start("test_safekeepers_wal_removal")
 
@@ -1081,6 +1092,14 @@ def test_delete_force(neon_env_builder: NeonEnvBuilder, auth_enabled: bool):
     neon_env_builder.auth_enabled = auth_enabled
     env = neon_env_builder.init_start()
 
+    # FIXME: are these expected?
+    env.pageserver.allowed_errors.extend(
+        [
+            ".*Failed to process query for timeline .*: Timeline .* was not found in global map.*",
+            ".*end streaming to Some.*",
+        ]
+    )
+
     # Create two tenants: one will be deleted, other should be preserved.
     tenant_id = env.initial_tenant
     timeline_id_1 = env.neon_cli.create_branch("br1")  # Active, delete explicitly
diff --git a/test_runner/regress/test_walredo_not_left_behind_on_detach.py b/test_runner/regress/test_walredo_not_left_behind_on_detach.py
index c79aea35da..aaaa8893a5 100644
--- a/test_runner/regress/test_walredo_not_left_behind_on_detach.py
+++ b/test_runner/regress/test_walredo_not_left_behind_on_detach.py
@@ -22,6 +22,8 @@ def assert_child_processes(pageserver_pid, wal_redo_present=False, defunct_prese
 # as a zombie process.
 def test_walredo_not_left_behind_on_detach(neon_env_builder: NeonEnvBuilder):
     env = neon_env_builder.init_start()
+    # We intentionally test for a non-existent tenant.
+    env.pageserver.allowed_errors.append(".*Tenant not found.*")
     pageserver_http = env.pageserver.http_client()
 
     pagserver_pid = int((env.repo_dir / "pageserver.pid").read_text())