diff --git a/AGENTS.md b/AGENTS.md
index d74c5445..0451e5ad 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -134,6 +134,19 @@ Example failure:
 
 Fix: prevent accidental nested `FuncCall` by inspecting and unwrapping recursively.
 
+## Custom testing strategy
+
+Please review the test utilities — note that exact SQL string equality is not required. The focus is on comparing the resulting ASTs.
+
+Refer to `expectAstMatch` to understand how correctness is validated.
+
+The pipeline is:
+parse(sql1) → ast → deparse(ast) → sql2
+While sql2 !== sql1 (textually), a correct round-trip means:
+parse(sql1) === parse(sql2) (AST-level equality).
+
+You can see `expectAstMatch` here: packages/deparser/test-utils/index.ts
+
 ---
 
 ### Development Setup
diff --git a/__fixtures__/generated/generated.json b/__fixtures__/generated/generated.json
index e8bfea92..9f569975 100644
--- a/__fixtures__/generated/generated.json
+++ b/__fixtures__/generated/generated.json
@@ -21090,7 +21090,11 @@
   "misc/issues-4.sql": "CREATE TABLE new_style (\n  id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,\n  val1 TEXT NOT NULL,\n  val2 TEXT NULL\n)",
   "misc/issues-5.sql": "ALTER TABLE new_style ADD CONSTRAINT uq_val1_val2_new UNIQUE NULLS NOT DISTINCT (val1, val2)",
   "misc/issues-6.sql": "INSERT INTO\n  public.people (id, name, epithet, is_great, gender, type_id, date_of_birth, date_of_death, place_of_birth, place_of_death, biography, canonical_status_id, image_url, source_url)\nVALUES\n  (1, 'Asterius', 'of Amasea', FALSE, 'M', 1, '0350-01-01', '0410-01-01', 'Cappadocia', 'Amasea', NULL, 1, NULL, NULL),\n  (2, 'Ausonius', NULL, FALSE, 'M', 1, '0310-01-01', '0395-01-01', 'Burdigala', NULL, NULL, NULL, NULL, NULL)\nON CONFLICT DO NOTHING",
-  "misc/issues-7.sql": "COMMENT ON COLUMN \"foo\".\"whatever\" IS $$\nSomething blah, this data may have chars like '\\n' and '\\r' in it.\n$$",
+  "misc/issues-7.sql": "CREATE TABLE public.ci_builds_runner_session (\n    id bigint NOT NULL,\n    build_id integer NOT NULL,\n    url character varying NOT NULL,\n    certificate character varying,\n    \"authorization\" character varying\n)",
+  "misc/issues-8.sql": "COMMENT ON COLUMN public.posts.reply_to_post_number IS 'If this post is a reply to another, this column is the post_number of the post it''s replying to. [FKEY posts.topic_id, posts.post_number]'",
+  "misc/issues-9.sql": "CREATE TABLE \"Album\"\n(\n  \"AlbumId\" INT NOT NULL,\n  \"Title\" VARCHAR(160) NOT NULL,\n  \"ArtistId\" INT NOT NULL,\n  CONSTRAINT \"PK_Album\" PRIMARY KEY  (\"AlbumId\")\n)",
+  "misc/issues-10.sql": "CREATE INDEX \"existing_undispatched_message\" ON public.messages USING btree (\"context_id\", context_type, notification_name, \"to\", user_id)",
+  "misc/issues-11.sql": "COMMENT ON COLUMN \"foo\".\"whatever\" IS $$\nSomething blah, this data may have chars like '\\n' and '\\r' in it.\n$$",
   "misc/inflection-1.sql": "CREATE SCHEMA inflection",
   "misc/inflection-2.sql": "GRANT USAGE ON SCHEMA inflection TO PUBLIC",
   "misc/inflection-3.sql": "ALTER DEFAULT PRIVILEGES IN SCHEMA inflection \n GRANT EXECUTE ON FUNCTIONS  TO PUBLIC",
diff --git a/__fixtures__/kitchen-sink/misc/issues.sql b/__fixtures__/kitchen-sink/misc/issues.sql
index ef87db58..076611af 100644
--- a/__fixtures__/kitchen-sink/misc/issues.sql
+++ b/__fixtures__/kitchen-sink/misc/issues.sql
@@ -26,7 +26,31 @@ VALUES
   (2, 'Ausonius', NULL, FALSE, 'M', 1, '0310-01-01', '0395-01-01', 'Burdigala', NULL, NULL, NULL, NULL, NULL)
 ON CONFLICT DO NOTHING;
 
+-- https://github.com/launchql/pgsql-parser/issues/52
+CREATE TABLE public.ci_builds_runner_session (
+    id bigint NOT NULL,
+    build_id integer NOT NULL,
+    url character varying NOT NULL,
+    certificate character varying,
+    "authorization" character varying
+);
+
+-- https://github.com/launchql/pgsql-parser/issues/50
+COMMENT ON COLUMN public.posts.reply_to_post_number IS 'If this post is a reply to another, this column is the post_number of the post it''s replying to. [FKEY posts.topic_id, posts.post_number]';
+
+-- https://github.com/launchql/pgsql-parser/issues/48
+CREATE TABLE "Album"
+(
+  "AlbumId" INT NOT NULL,
+  "Title" VARCHAR(160) NOT NULL,
+  "ArtistId" INT NOT NULL,
+  CONSTRAINT "PK_Album" PRIMARY KEY  ("AlbumId")
+);
+
+-- https://github.com/launchql/pgsql-parser/issues/47
+CREATE INDEX "existing_undispatched_message" ON public.messages USING btree ("context_id", context_type, notification_name, "to", user_id);
+
 -- https://github.com/launchql/pgsql-parser/issues/124
 COMMENT ON COLUMN "foo"."whatever" IS $$
 Something blah, this data may have chars like '\n' and '\r' in it.
-$$;
\ No newline at end of file
+$$;
diff --git a/packages/deparser/__tests__/kitchen-sink/misc-issues.test.ts b/packages/deparser/__tests__/kitchen-sink/misc-issues.test.ts
index 66458e8c..d8008b69 100644
--- a/packages/deparser/__tests__/kitchen-sink/misc-issues.test.ts
+++ b/packages/deparser/__tests__/kitchen-sink/misc-issues.test.ts
@@ -10,6 +10,10 @@ it('misc-issues', async () => {
   "misc/issues-4.sql",
   "misc/issues-5.sql",
   "misc/issues-6.sql",
-  "misc/issues-7.sql"
+  "misc/issues-7.sql",
+  "misc/issues-8.sql",
+  "misc/issues-9.sql",
+  "misc/issues-10.sql",
+  "misc/issues-11.sql"
 ]);
 });