diff --git a/internal/rosa/gnu.go b/internal/rosa/gnu.go
index fbee922..0da7ea8 100644
--- a/internal/rosa/gnu.go
+++ b/internal/rosa/gnu.go
@@ -64,7 +64,10 @@ cd "$(mktemp -d)"
 /usr/src/autoconf/configure \
 	--prefix=/system \
 	--build="${ROSA_TRIPLE}"
-make "-j$(nproc)" check
+make \
+	"-j$(nproc)" \
+	TESTSUITEFLAGS="-j$(nproc)" \
+	check
 make DESTDIR=/work install
 `, pkg.Path(AbsUsrSrc.Append("autoconf"), false, pkg.NewHTTPGetTar(
 		nil,