diff --git a/tests/lib/spsc_pbuf/src/main.c b/tests/lib/spsc_pbuf/src/main.c
index 6d2954f7667..00332d673ea 100644
--- a/tests/lib/spsc_pbuf/src/main.c
+++ b/tests/lib/spsc_pbuf/src/main.c
@@ -436,7 +436,7 @@ bool stress_read(void *user_data, uint32_t cnt, bool last, int prio)
 			zassert_true(false, "Unexpected error: %d, cnt:%d", len, ctx->read_cnt);
 		}
 
-		check_buffer(buf, len, ctx->read_cnt);
+		zassert_ok(check_buffer(buf, len, ctx->read_cnt));
 		ctx->read_cnt++;
 	}
 
@@ -499,7 +499,7 @@ bool stress_claim_free(void *user_data, uint32_t cnt, bool last, int prio)
 			return true;
 		}
 
-		check_buffer(buf, len, ctx->read_cnt);
+		zassert_ok(check_buffer(buf, len, ctx->read_cnt));
 
 		spsc_pbuf_free(ctx->pbuf, len);