diff --git a/src/test/modules/test_misc/Makefile b/src/test/modules/test_misc/Makefile
index a958d156f4..919a25fc67 100644
--- a/src/test/modules/test_misc/Makefile
+++ b/src/test/modules/test_misc/Makefile
@@ -4,7 +4,7 @@ TAP_TESTS = 1
 
 EXTRA_INSTALL=src/test/modules/injection_points
 
-export enable_injection_points enable_injection_points
+export enable_injection_points
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
diff --git a/src/test/recovery/Makefile b/src/test/recovery/Makefile
index f57baba5e8..d40c05a566 100644
--- a/src/test/recovery/Makefile
+++ b/src/test/recovery/Makefile
@@ -18,7 +18,7 @@ subdir = src/test/recovery
 top_builddir = ../../..
 include $(top_builddir)/src/Makefile.global
 
-export enable_injection_points enable_injection_points
+export enable_injection_points
 
 # required for 017_shm.pl and 027_stream_regress.pl
 REGRESS_SHLIB=$(abs_top_builddir)/src/test/regress/regress$(DLSUFFIX)