diff --git a/test/aupos.c b/test/aupos.c
index 4887fda43..9cd159a97 100644
--- a/test/aupos.c
+++ b/test/aupos.c
@@ -19,7 +19,7 @@ int test_auposition(void)
 	struct aufile *af = NULL;
 	struct aufile_prm prm;
 	char path[256];
-	uint8_t buffer[128];
+	uint8_t buffer[512];
 
 	re_snprintf(path, sizeof(path), "%s/beep.wav", test_datapath());
 
@@ -29,13 +29,30 @@ int test_auposition(void)
 	err = aufile_set_position(af, &prm, 67);
 	TEST_ERR(err);
 
-	/* That file is 67 ms long, so we shouldn't read anything */
+	/* That file is exactly 67 ms long, so we shouldn't read anything */
 	size_t size = sizeof(buffer);
 	err = aufile_read(af, buffer, &size);
 	TEST_ERR(err);
 
 	TEST_EQUALS(0, size);
 
+	af = mem_deref(af);
+
+	err = aufile_open(&af, &prm, path, AUFILE_READ);
+	TEST_ERR(err);
+
+	err = aufile_set_position(af, &prm, 37);
+	TEST_ERR(err);
+
+	size = sizeof(buffer);
+	err = aufile_read(af, buffer, &size);
+	TEST_ERR(err);
+
+	/* 30 ms should be left, at 8000Hz/s, one channels and 16 bit samples
+	   that's 480 bytes */
+	TEST_EQUALS(480, size);
+
+
 out:
 	mem_deref(af);