diff --git a/test_runner/fixtures/neon_fixtures.py b/test_runner/fixtures/neon_fixtures.py
index 0728a33a63..990db1aed0 100644
--- a/test_runner/fixtures/neon_fixtures.py
+++ b/test_runner/fixtures/neon_fixtures.py
@@ -1065,6 +1065,9 @@ class NeonEnv:
                 "http_auth_type": http_auth_type,
                 # Default which can be overriden with `NeonEnvBuilder.pageserver_config_override`
                 "availability_zone": "us-east-2a",
+                # Disable pageserver disk syncs in tests: when running tests concurrently, this avoids
+                # the pageserver taking a long time to start up due to syncfs flushing other tests' data
+                "no_sync": True,
             }
             if self.pageserver_virtual_file_io_engine is not None:
                 ps_cfg["virtual_file_io_engine"] = self.pageserver_virtual_file_io_engine