diff --git a/contrib/dblink/Makefile b/contrib/dblink/Makefile
index ac637480eb5..9674a149ee0 100644
--- a/contrib/dblink/Makefile
+++ b/contrib/dblink/Makefile
@@ -11,6 +11,9 @@ DATA = dblink--1.0.sql dblink--unpackaged--1.0.sql
 
 REGRESS = dblink
 
+# the db name is hard-coded in the tests
+override undefine USE_MODULE_DB
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 3bf658d6b0c..9830b17830e 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -431,6 +431,15 @@ submake-libpgport:
 
 PL_TESTDB = pl_regression
 CONTRIB_TESTDB = contrib_regression
+ifneq ($(MODULE_big),)
+  CONTRIB_TESTDB_MODULE = contrib_regression_$(MODULE_big)
+else 
+  ifneq ($(MODULES),)
+    CONTRIB_TESTDB_MODULE = contrib_regression_$(MODULES)
+  else
+    CONTRIB_TESTDB_MODULE = contrib_regression
+  endif
+endif
 
 ifdef NO_LOCALE
 NOLOCALE += --no-locale
diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 30c4b573e40..2059c07eabb 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -230,7 +230,11 @@ distclean maintainer-clean: clean
 ifdef REGRESS
 
 # Select database to use for running the tests
-REGRESS_OPTS += --dbname=$(CONTRIB_TESTDB)
+ifdef USE_MODULE_DB
+  REGRESS_OPTS += --dbname=$(CONTRIB_TESTDB_MODULE)
+else
+  REGRESS_OPTS += --dbname=$(CONTRIB_TESTDB)
+endif
 
 # where to find psql for running the tests
 PSQLDIR = $(bindir)