diff --git a/nixos/tests/postgresql/default.nix b/nixos/tests/postgresql/default.nix
index 3aa7db540397..4fe7e7a37e7e 100644
--- a/nixos/tests/postgresql/default.nix
+++ b/nixos/tests/postgresql/default.nix
@@ -20,7 +20,6 @@ in
   anonymizer = importWithArgs ./anonymizer.nix;
   pgjwt = importWithArgs ./pgjwt.nix;
   pgvecto-rs = importWithArgs ./pgvecto-rs.nix;
-  pgx_ulid = importWithArgs ./pgx_ulid.nix;
   timescaledb = importWithArgs ./timescaledb.nix;
   tsja = importWithArgs ./tsja.nix;
   wal2json = importWithArgs ./wal2json.nix;
diff --git a/nixos/tests/postgresql/pgx_ulid.nix b/nixos/tests/postgresql/pgx_ulid.nix
deleted file mode 100644
index e6ee9a129632..000000000000
--- a/nixos/tests/postgresql/pgx_ulid.nix
+++ /dev/null
@@ -1,93 +0,0 @@
-{
-  pkgs,
-  makeTest,
-}:
-let
-  inherit (pkgs) lib;
-
-  test-sql = pkgs.writeText "postgresql-test" ''
-    CREATE EXTENSION ulid;
-
-    CREATE TABLE items (
-      id ulid NOT NULL DEFAULT gen_monotonic_ulid() PRIMARY KEY,
-      created_at TIMESTAMP GENERATED ALWAYS AS (id::TIMESTAMP) STORED
-    );
-
-    INSERT INTO items (id) VALUES
-      ('01JGSK6X4APE5X5629ESGJBBV8'), -- 2025-01-03T21:23:17.770Z
-      ('01ARZ3NDEKTSV4RRFFQ69G5FAV'); -- 2016-07-30T23:54:10.259Z
-  '';
-
-  makeTestFor =
-    package:
-    makeTest {
-      name = "pgx_ulid-${package.name}";
-      meta = with lib.maintainers; {
-        maintainers = [ myypo ];
-      };
-
-      nodes.machine =
-        { ... }:
-        {
-          services.postgresql = {
-            inherit package;
-            enable = true;
-            enableJIT = lib.hasInfix "-jit-" package.name;
-            extensions =
-              ps: with ps; [
-                pgx_ulid
-              ];
-            settings.shared_preload_libraries = "pgx_ulid";
-          };
-        };
-
-      testScript =
-        { nodes, ... }:
-        let
-          inherit (nodes.machine.services.postgresql.package.pkgs) pgx_ulid;
-        in
-        ''
-          def check_count(statement, lines):
-              return 'test $(sudo -u postgres psql postgres -tAc "{}"|wc -l) -eq {}'.format(
-                  statement, lines
-              )
-
-          machine.start()
-          machine.wait_for_unit("postgresql")
-
-          with subtest("Postgresql with extension ulid is available just after unit start"):
-              machine.succeed(check_count("SELECT * FROM pg_available_extensions WHERE name = 'ulid' AND default_version = '${pgx_ulid.version}';", 1))
-
-          machine.succeed("sudo -u postgres psql -f ${test-sql}")
-
-          machine.succeed(check_count("SELECT gen_ulid();", 1))
-          machine.succeed(check_count("SELECT gen_monotonic_ulid();", 1))
-
-          with subtest("Can generate default ULIDs and query by ULID-derived timestamps"):
-              machine.succeed("""
-                sudo -u postgres \\
-                  psql -c "SELECT id FROM items ORDER BY created_at DESC LIMIT 1;" \\
-                    | grep "01JGSK6X4APE5X5629ESGJBBV8"
-              """)
-              machine.succeed("""
-                sudo -u postgres \\
-                  psql -c "INSERT INTO items DEFAULT VALUES;"
-              """)
-              machine.succeed("""
-                sudo -u postgres \\
-                  psql -c "SELECT id FROM items ORDER BY created_at ASC LIMIT 1;" \\
-                    | grep "01ARZ3NDEKTSV4RRFFQ69G5FAV"
-              """)
-
-          machine.shutdown()
-        '';
-    };
-in
-lib.recurseIntoAttrs (
-  lib.concatMapAttrs (n: p: { ${n} = makeTestFor p; }) (
-    lib.filterAttrs (_: p: !p.pkgs.pgx_ulid.meta.broken) pkgs.postgresqlVersions
-  )
-  // {
-    passthru.override = p: makeTestFor p;
-  }
-)
diff --git a/pkgs/servers/sql/postgresql/ext/pgx_ulid.nix b/pkgs/servers/sql/postgresql/ext/pgx_ulid.nix
index 43e48542d87d..7fdd04a4285e 100644
--- a/pkgs/servers/sql/postgresql/ext/pgx_ulid.nix
+++ b/pkgs/servers/sql/postgresql/ext/pgx_ulid.nix
@@ -3,7 +3,6 @@
   buildPgrxExtension,
   fetchFromGitHub,
   nix-update-script,
-  nixosTests,
   postgresql,
   util-linux,
 }:
@@ -35,7 +34,6 @@ buildPgrxExtension rec {
 
   passthru = {
     updateScript = nix-update-script { };
-    tests = nixosTests.postgresql.pgx_ulid.passthru.override postgresql;
   };
 
   meta = {