diff --git a/sql.mk b/sql.mk
index 60663c4..6fd84dd 100644
--- a/sql.mk
+++ b/sql.mk
@@ -80,27 +80,6 @@ all: sql/cat_tools.sql $(versioned_out)
 installcheck: sql/cat_tools.sql $(versioned_out)
 EXTRA_CLEAN += sql/cat_tools.sql $(versioned_out)
 
-# pgxntool 2.2.0's check-stale-expected depends directly on installcheck, but
-# base.mk appends it to TEST_DEPS -- and so freezes `test`'s prerequisite list,
-# expanded at the `test: $(TEST_DEPS)` rule's parse time -- BEFORE
-# test-build/install/installcheck are appended. Reassigning TEST_DEPS from
-# here does not help: it's too late to change a prerequisite list Make already
-# expanded. So `make test` resolves check-stale-expected's installcheck edge
-# BEFORE test-build's install edge, running the full suite before install ever
-# runs on a tree where nothing is installed yet (e.g. fresh CI) -- reproduced
-# there as every test failing with schema "cat_tools" does not exist. Filed
-# upstream: https://github.com/Postgres-Extensions/pgxntool/issues/79.
-#
-# Give installcheck itself an install prerequisite to fix it, EXCEPT in
-# TEST_EXISTING_DEPLOY=pgtle mode: bin/test_existing's pg_tle-mode run_suite
-# deliberately calls `testdeps installcheck` directly (bypassing `test`'s own
-# install prerequisite, and thus never touching check-stale-expected at all)
-# specifically so the filesystem is never touched -- an unconditional
-# installcheck-level fix would defeat that.
-ifneq ($(TEST_EXISTING_DEPLOY),pgtle)
-installcheck: install
-endif
-
 #
 # relkind drift source generation
 #