diff --git a/contrib/contrib-global.mk b/contrib/contrib-global.mk
index ba49610..6ac8e9b 100644
--- a/contrib/contrib-global.mk
+++ b/contrib/contrib-global.mk
@@ -1,9 +1,4 @@
 # contrib/contrib-global.mk
 
-# file with extra config for temp build
-ifdef TEMP_CONFIG
-REGRESS_OPTS += --temp-config=$(TEMP_CONFIG)
-endif
-
 NO_PGXS = 1
 include $(top_srcdir)/src/makefiles/pgxs.mk
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index e94d6a5..47b265e 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -524,14 +524,20 @@ ifdef NO_LOCALE
 NOLOCALE += --no-locale
 endif
 
+# file with extra config for temp build
+TEMP_CONF =
+ifdef TEMP_CONFIG
+TEMP_CONF += --temp-config=$(TEMP_CONFIG)
+endif
+
 pg_regress_locale_flags = $(if $(ENCODING),--encoding=$(ENCODING)) $(NOLOCALE)
 
-pg_regress_check = $(with_temp_install) $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --temp-instance=./tmp_check --bindir= $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
+pg_regress_check = $(with_temp_install) $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --temp-instance=./tmp_check $(TEMP_CONF) --bindir= $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
 pg_regress_installcheck = $(top_builddir)/src/test/regress/pg_regress --inputdir=$(srcdir) --bindir='$(bindir)' $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
 
 pg_regress_clean_files = results/ regression.diffs regression.out tmp_check/ log/
 
-pg_isolation_regress_check = $(with_temp_install) $(top_builddir)/src/test/isolation/pg_isolation_regress --inputdir=$(srcdir) --temp-instance=./tmp_check --bindir= $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
+pg_isolation_regress_check = $(with_temp_install) $(top_builddir)/src/test/isolation/pg_isolation_regress --inputdir=$(srcdir) --temp-instance=./tmp_check $(TEMP_CONF) --bindir= $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
 pg_isolation_regress_installcheck = $(top_builddir)/src/test/isolation/pg_isolation_regress --inputdir=$(srcdir) $(pg_regress_locale_flags) $(EXTRA_REGRESS_OPTS)
 
 ##########################################################################
diff --git a/src/interfaces/ecpg/test/Makefile b/src/interfaces/ecpg/test/Makefile
index a4ac021..4ed785b 100644
--- a/src/interfaces/ecpg/test/Makefile
+++ b/src/interfaces/ecpg/test/Makefile
@@ -78,11 +78,11 @@ endif
 REGRESS_OPTS = --dbname=regress1,connectdb --create-role=connectuser,connectdb $(EXTRA_REGRESS_OPTS)
 
 check: all
-	$(with_temp_install) ./pg_regress $(REGRESS_OPTS) --temp-instance=./tmp_check --bindir= $(pg_regress_locale_flags) $(THREAD) --schedule=$(srcdir)/ecpg_schedule
+	$(with_temp_install) ./pg_regress $(REGRESS_OPTS) --temp-instance=./tmp_check $(TEMP_CONF) --bindir= $(pg_regress_locale_flags) $(THREAD) --schedule=$(srcdir)/ecpg_schedule
 
 # the same options, but with --listen-on-tcp
 checktcp: all
-	$(with_temp_install) ./pg_regress $(REGRESS_OPTS) --temp-instance=./tmp_check --bindir= $(pg_regress_locale_flags) $(THREAD) --schedule=$(srcdir)/ecpg_schedule_tcp --host=localhost
+	$(with_temp_install) ./pg_regress $(REGRESS_OPTS) --temp-instance=./tmp_check $(TEMP_CONF) --bindir= $(pg_regress_locale_flags) $(THREAD) --schedule=$(srcdir)/ecpg_schedule_tcp --host=localhost
 
 installcheck: all
 	./pg_regress $(REGRESS_OPTS) --bindir='$(bindir)' $(pg_regress_locale_flags) $(THREAD) --schedule=$(srcdir)/ecpg_schedule
diff --git a/src/test/isolation/Makefile b/src/test/isolation/Makefile
index 4577509..3d272d5 100644
--- a/src/test/isolation/Makefile
+++ b/src/test/isolation/Makefile
@@ -55,7 +55,7 @@ installcheck: all
 	./pg_isolation_regress --bindir='$(bindir)' $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule
 
 check: all
-	$(with_temp_install) ./pg_isolation_regress --temp-instance=./tmp_check --inputdir=$(srcdir) --bindir= $(EXTRA_REGRESS_OPTS) --schedule=$(srcdir)/isolation_schedule
+	$(with_temp_install) ./pg_isolation_regress --temp-instance=./tmp_check $(TEMP_CONF) --inputdir=$(srcdir) --bindir= $(EXTRA_REGRESS_OPTS) --schedule=$(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,
@@ -65,4 +65,4 @@ installcheck-prepared-txns: all temp-install
 	./pg_isolation_regress --bindir='$(bindir)' $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule prepared-transactions
 
 check-prepared-txns: all temp-install
-	./pg_isolation_regress --temp-instance=./tmp_check $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule prepared-transactions
+	./pg_isolation_regress --temp-instance=./tmp_check $(TEMP_CONF) $(EXTRA_REGRESS_OPTS) --inputdir=$(srcdir) --schedule=$(srcdir)/isolation_schedule prepared-transactions
diff --git a/src/test/regress/GNUmakefile b/src/test/regress/GNUmakefile
index 204099a..4f55f52 100644
--- a/src/test/regress/GNUmakefile
+++ b/src/test/regress/GNUmakefile
@@ -17,12 +17,6 @@ subdir = src/test/regress
 top_builddir = ../../..
 include $(top_builddir)/src/Makefile.global
 
-# file with extra config for temp build
-TEMP_CONF =
-ifdef TEMP_CONFIG
-TEMP_CONF += --temp-config=$(TEMP_CONFIG)
-endif
-
 # maximum simultaneous connections for parallel tests
 MAXCONNOPT =
 ifdef MAX_CONNECTIONS