diff --git a/contrib/pg_upgrade/Makefile b/contrib/pg_upgrade/Makefile
index bbb14a1b66..ffcdad8157 100644
--- a/contrib/pg_upgrade/Makefile
+++ b/contrib/pg_upgrade/Makefile
@@ -25,7 +25,7 @@ include $(top_srcdir)/contrib/contrib-global.mk
 endif
 
 check: test.sh all
-	MAKE=$(MAKE) bindir=$(bindir) libdir=$(libdir) $(SHELL) $< --install
+	MAKE=$(MAKE) bindir=$(bindir) libdir=$(libdir) EXTRA_REGRESS_OPTS="$(EXTRA_REGRESS_OPTS)" $(SHELL) $< --install
 
 # disabled because it upsets the build farm
 #installcheck: test.sh
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 4c8454cad7..e0e9b793a2 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -458,8 +458,8 @@ endif
 
 pg_regress_locale_flags = $(if $(ENCODING),--encoding=$(ENCODING)) $(NOLOCALE)
 
-pg_regress_check = $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --temp-install=./tmp_check --top-builddir=$(top_builddir) $(pg_regress_locale_flags)
-pg_regress_installcheck = $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --psqldir='$(PSQLDIR)' $(pg_regress_locale_flags)
+pg_regress_check = $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --temp-install=./tmp_check --top-builddir=$(top_builddir) $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
+pg_regress_installcheck = $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --psqldir='$(PSQLDIR)' $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
 
 pg_regress_clean_files = results/ regression.diffs regression.out tmp_check/ log/
 
diff --git a/src/test/isolation/Makefile b/src/test/isolation/Makefile
index 5e5c9bb74e..26bcf22392 100644
--- a/src/test/isolation/Makefile
+++ b/src/test/isolation/Makefile
@@ -52,17 +52,17 @@ maintainer-clean: distclean
 	rm -f specparse.c specscanner.c
 
 installcheck: all
-	./pg_isolation_regress --psqldir='$(PSQLDIR)' --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule
+	./pg_isolation_regress --psqldir='$(PSQLDIR)' $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule
 
 check: all
-	./pg_isolation_regress --temp-install=./tmp_check --inputdir=$(srcdir) --top-builddir=$(top_builddir) --schedule=$(srcdir)/isolation_schedule
+	./pg_isolation_regress --temp-install=./tmp_check --inputdir=$(srcdir) --top-builddir=$(top_builddir) $(EXTRA_REGRESS_OPTS) --schedule=$(srcdir)/isolation_schedule
 
 # Versions of the check tests that include the prepared_transactions test
 # It only makes sense to run these if set up to use prepared transactions,
 # via TEMP_CONFIG for the check case, or via the postgresql.conf for the
 # installcheck case.
 installcheck-prepared-txns: all
-	./pg_isolation_regress --psqldir='$(PSQLDIR)' --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule prepared-transactions
+	./pg_isolation_regress --psqldir='$(PSQLDIR)' $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule prepared-transactions
 
 check-prepared-txns: all
-	./pg_isolation_regress --temp-install=./tmp_check --inputdir=$(srcdir) --top-builddir=$(top_builddir) --schedule=$(srcdir)/isolation_schedule prepared-transactions
+	./pg_isolation_regress --temp-install=./tmp_check $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --top-builddir=$(top_builddir) --schedule=$(srcdir)/isolation_schedule prepared-transactions