diff --git a/tests/test27cells.c b/tests/test27cells.c
index b1c2dd7ad607861eeb82f3f9c35b70df0dde409c..89953c5bcac2e75ebe1af2b74a11fcc67a3d2c11 100644
--- a/tests/test27cells.c
+++ b/tests/test27cells.c
@@ -52,6 +52,11 @@
 #define DOPAIR1_NAME "runner_dopair1_density_vec_2"
 #endif
 
+#if defined(WITH_VECTORIZATION) && defined(DOPAIR1_VEC_3)
+#define DOPAIR1 runner_dopair1_density_vec_3
+#define DOPAIR1_NAME "runner_dopair1_density_vec_3"
+#endif
+
 #if defined(WITH_VECTORIZATION) && defined(DOPAIR1_AUTO_VEC)
 #define DOPAIR1 runner_dopair1_density_auto_vec
 #define DOPAIR1_NAME "runner_dopair1_density_auto_vec"
@@ -311,6 +316,7 @@ int check_results(struct part *serial_parts, struct part *vec_parts, int count,
 void runner_dopair1_density(struct runner *r, struct cell *ci, struct cell *cj);
 void runner_dopair1_density_vec(struct runner *r, struct cell *ci, struct cell *cj);
 void runner_dopair1_density_vec_2(struct runner *r, struct cell *ci, struct cell *cj);
+void runner_dopair1_density_vec_3(struct runner *r, struct cell *ci, struct cell *cj);
 void runner_dopair1_density_auto_vec(struct runner *r, struct cell *ci, struct cell *cj);
 void runner_doself1_density(struct runner *r, struct cell *ci);
 void runner_doself1_density_vec(struct runner *r, struct cell *ci);