diff --git a/Makefile.pre.in b/Makefile.pre.in
index 0cb9db744433a9..812bc93055e58e 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -2121,6 +2121,7 @@ TESTSUBDIRS=	idlelib/idle_test \
 		test/certdata/capath \
 		test/cjkencodings \
 		test/crashers \
+		test/configdata \
 		test/data \
 		test/decimaltestdata \
 		test/dtracedata \