diff --git a/src/test/modules/unsafe_tests/Makefile b/src/test/modules/unsafe_tests/Makefile
index 321252f8d5..69d1298438 100644
--- a/src/test/modules/unsafe_tests/Makefile
+++ b/src/test/modules/unsafe_tests/Makefile
@@ -2,6 +2,9 @@
 
 REGRESS = rolenames
 
+# the whole point of these tests is to not run installcheck
+NO_INSTALLCHECK = 1
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
diff --git a/src/test/modules/unsafe_tests/README b/src/test/modules/unsafe_tests/README
index a7e5b2a04f..d9dbd038b9 100644
--- a/src/test/modules/unsafe_tests/README
+++ b/src/test/modules/unsafe_tests/README
@@ -1,6 +1,6 @@
 This directory doesn't actually contain any extension module.
 
-What it is is a home for regression tests that we don't want to run
+Instead it is a home for regression tests that we don't want to run
 during "make installcheck" because they could have side-effects that
 seem undesirable for a production installation.