diff --git a/gc_bba_test/source/tests.c b/gc_bba_test/source/tests.c
index b87484b..440ac3e 100644
--- a/gc_bba_test/source/tests.c
+++ b/gc_bba_test/source/tests.c
@@ -325,6 +325,22 @@ static int t_rx(char *m, size_t n)
 	u8 r0[2], r1[2];
 	int i, ir;
 	if (bba_read(REG_RWP_LO, r0, 2) < 0) { snprintf(m, n, "RWP read failed"); return 1; }
+	/* Catch RRP up to RWP before waiting, i.e. declare everything already in
+	 * the ring consumed -- which is what a real driver does once it has read
+	 * the frames out, and what netboot does at start-up.
+	 *
+	 * ⚠️ Without this the test fails on a HEALTHY adapter.  This app never
+	 * writes RRP, so ambient broadcast traffic fills the 15-page ring, `free`
+	 * falls below _MAX_FRAME_PAGES (6) and RBFI then drops EVERY frame --
+	 * correctly, to avoid lapping.  RWP stops advancing permanently and this
+	 * test reports "no frame in 2 s (RWP still 0x000F)" for the rest of the
+	 * session.  Page 15 is the giveaway: free = (1 + 15 - 15) mod 15 = 1.
+	 *
+	 * Freeing the ring here also leaves exactly the newly received frame
+	 * unconsumed at RRP, which is where the SPRAM/DMA suite reads. */
+	if (bba_w8(REG_RRP_LO, r0[0]) < 0) {
+		snprintf(m, n, "RRP write failed"); return 1;
+	}
 	for (i = 0; i < 200; i++) {                 /* up to ~2 s */
 		if (bba_read(REG_RWP_LO, r1, 2) < 0) { snprintf(m, n, "RWP read failed"); return 1; }
 		ir = bba_r8(REG_IR);