diff --git a/lib/test/cryb_t_main.c b/lib/test/cryb_t_main.c
index dae1658..7d10b61 100644
--- a/lib/test/cryb_t_main.c
+++ b/lib/test/cryb_t_main.c
@@ -120,7 +120,7 @@ t_add_test(t_func *func, void *arg, const char *fmt, ...)
 		err(1, "malloc()");
 	t->func = func;
 	va_start(ap, fmt);
-	vasprintf(&t->desc, fmt, ap);
+	(void)vasprintf(&t->desc, fmt, ap);
 	va_end(ap);
 	t->arg = arg;
 	t_grow(1);
diff --git a/lib/test/cryb_t_malloc.c b/lib/test/cryb_t_malloc.c
index 0d3d9ea..7073de1 100644
--- a/lib/test/cryb_t_malloc.c
+++ b/lib/test/cryb_t_malloc.c
@@ -551,9 +551,9 @@ t_malloc_leaked(char **desc, void *arg CRYB_UNUSED)
 	}
 	nleaked += nmapalloc - nmapfree;
 	if (nleaked > 0)
-		asprintf(desc, "%lu allocation(s) leaked", nleaked);
+		(void)asprintf(desc, "%lu allocation(s) leaked", nleaked);
 	else
-		asprintf(desc, "%s", "no memory leaked");
+		(void)asprintf(desc, "%s", "no memory leaked");
 	return (nleaked == 0);
 }
 
diff --git a/t/t_aes.c b/t/t_aes.c
index 25c8328..c9a069d 100644
--- a/t/t_aes.c
+++ b/t/t_aes.c
@@ -114,7 +114,7 @@ t_aes_enc(char **desc CRYB_UNUSED, void *arg)
 	uint8_t out[AES_BLOCK_LEN];
 	aes_ctx ctx;
 
-	asprintf(desc, "%s (encrypt)", t->desc);
+	(void)asprintf(desc, "%s (encrypt)", t->desc);
 	aes_init(&ctx, CIPHER_MODE_ENCRYPT, t->key, t->keylen / 8);
 	aes_update(&ctx, t->ptext, AES_BLOCK_LEN, out);
 	aes_finish(&ctx);
@@ -128,7 +128,7 @@ t_aes_dec(char **desc CRYB_UNUSED, void *arg)
 	uint8_t out[AES_BLOCK_LEN];
 	aes_ctx ctx;
 
-	asprintf(desc, "%s (decrypt)", t->desc);
+	(void)asprintf(desc, "%s (decrypt)", t->desc);
 	aes_init(&ctx, CIPHER_MODE_DECRYPT, t->key, t->keylen / 8);
 	aes_update(&ctx, t->ctext, AES_BLOCK_LEN, out);
 	aes_finish(&ctx);
diff --git a/t/t_fletcher.c b/t/t_fletcher.c
index adae8df..5bbed7e 100644
--- a/t/t_fletcher.c
+++ b/t/t_fletcher.c
@@ -253,7 +253,7 @@ t_fletcher16(char **desc, void *arg)
 {
 	struct t_case *t = arg;
 
-	asprintf(desc, "(16-bit) %s", t->desc);
+	(void)asprintf(desc, "(16-bit) %s", t->desc);
 	return (t_compare_x16(t->sum16, fletcher16_hash(t->data, t->len)));
 }
 
@@ -262,7 +262,7 @@ t_fletcher32(char **desc, void *arg)
 {
 	struct t_case *t = arg;
 
-	asprintf(desc, "(32-bit) %s", t->desc);
+	(void)asprintf(desc, "(32-bit) %s", t->desc);
 	return (t_compare_x32(t->sum32, fletcher32_hash(t->data, t->len)));
 }
 
@@ -271,7 +271,7 @@ t_fletcher64(char **desc, void *arg)
 {
 	struct t_case *t = arg;
 
-	asprintf(desc, "(64-bit) %s", t->desc);
+	(void)asprintf(desc, "(64-bit) %s", t->desc);
 	return (t_compare_x64(t->sum64, fletcher64_hash(t->data, t->len)));
 }
 
diff --git a/t/t_md2.c b/t/t_md2.c
index dfa7336..1e57f68 100644
--- a/t/t_md2.c
+++ b/t/t_md2.c
@@ -184,7 +184,7 @@ t_md2_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_md4.c b/t/t_md4.c
index eb8995d..70000bf 100644
--- a/t/t_md4.c
+++ b/t/t_md4.c
@@ -200,7 +200,7 @@ t_md4_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_md5.c b/t/t_md5.c
index c4252c7..121174c 100644
--- a/t/t_md5.c
+++ b/t/t_md5.c
@@ -200,7 +200,7 @@ t_md5_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_sha1.c b/t/t_sha1.c
index fd121c4..04afc37 100644
--- a/t/t_sha1.c
+++ b/t/t_sha1.c
@@ -193,7 +193,7 @@ t_sha1_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_sha224.c b/t/t_sha224.c
index 7c92a4c..bd8e835 100644
--- a/t/t_sha224.c
+++ b/t/t_sha224.c
@@ -202,7 +202,7 @@ t_sha224_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_sha256.c b/t/t_sha256.c
index 767ae40..35067c1 100644
--- a/t/t_sha256.c
+++ b/t/t_sha256.c
@@ -198,7 +198,7 @@ t_sha256_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_sha384.c b/t/t_sha384.c
index 5003df9..c57da43 100644
--- a/t/t_sha384.c
+++ b/t/t_sha384.c
@@ -214,7 +214,7 @@ t_sha384_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }
diff --git a/t/t_sha512.c b/t/t_sha512.c
index 1c25c82..6a55273 100644
--- a/t/t_sha512.c
+++ b/t/t_sha512.c
@@ -224,7 +224,7 @@ t_sha512_perf(char **desc, void *arg)
 	clock_gettime(CLOCK_MONOTONIC, &te);
 	ns = te.tv_sec * 1000000000LU + te.tv_nsec;
 	ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
-	asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
+	(void)asprintf(desc, "%zu bytes: %d iterations in %'lu ns",
 	    msglen, T_PERF_ITERATIONS, ns);
 	return (1);
 }