diff --git a/test_runner/regress/test_attach_tenant_config.py b/test_runner/regress/test_attach_tenant_config.py
index d2bd53d8aa..352ec13884 100644
--- a/test_runner/regress/test_attach_tenant_config.py
+++ b/test_runner/regress/test_attach_tenant_config.py
@@ -52,7 +52,16 @@ def negative_env(neon_env_builder: NeonEnvBuilder) -> Generator[NegativeTests, N
         TenantId(t["id"]) for t in ps_http.tenant_list()
     ], "tenant should not be attached after negative test"
 
-    env.pageserver.allowed_errors.append(".*Error processing HTTP request: Bad request")
+    env.pageserver.allowed_errors.extend(
+        [
+            # This fixture detaches the tenant, and tests using it will tend to re-attach it
+            # shortly after. There may be un-processed deletion_queue validations from the
+            # initial attachment
+            ".*Dropped remote consistent LSN updates.*",
+            # This fixture is for tests that will intentionally generate 400 responses
+            ".*Error processing HTTP request: Bad request",
+        ]
+    )
 
     def log_contains_bad_request():
         env.pageserver.log_contains(".*Error processing HTTP request: Bad request")