diff --git a/test/default/misuse.c b/test/default/misuse.c
index d1cced4a..65c59155 100644
--- a/test/default/misuse.c
+++ b/test/default/misuse.c
@@ -6,12 +6,48 @@
 # include <signal.h>
 
 static void
-sigabrt_handler_6(int sig)
+sigabrt_handler_10(int sig)
 {
     (void) sig;
     exit(0);
 }
 
+static void
+sigabrt_handler_9(int sig)
+{
+    (void) sig;
+    signal(SIGABRT, sigabrt_handler_10);
+    assert(sodium_base642bin(NULL, 1, NULL, 1, NULL, NULL, NULL, -1) == -1);
+    exit(1);
+}
+
+static void
+sigabrt_handler_8(int sig)
+{
+    (void) sig;
+    signal(SIGABRT, sigabrt_handler_9);
+    assert(sodium_bin2base64(NULL, 1, NULL, 1, sodium_base64_VARIANT_ORIGINAL) == NULL);
+    exit(1);
+}
+
+static void
+sigabrt_handler_7(int sig)
+{
+    (void) sig;
+    signal(SIGABRT, sigabrt_handler_8);
+    assert(sodium_bin2base64(NULL, 1, NULL, 1, -1) == NULL);
+    exit(1);
+}
+
+static void
+sigabrt_handler_6(int sig)
+{
+    (void) sig;
+    signal(SIGABRT, sigabrt_handler_7);
+    assert(sodium_pad(NULL, NULL, SIZE_MAX, 16, 1) == -1);
+    exit(1);
+}
+
 static void
 sigabrt_handler_5(int sig)
 {
diff --git a/test/default/sodium_utils.c b/test/default/sodium_utils.c
index 6955feb8..19f3a0d8 100644
--- a/test/default/sodium_utils.c
+++ b/test/default/sodium_utils.c
@@ -209,6 +209,19 @@ main(void)
     assert(sodium_base642bin(buf1, sizeof buf1, "O", (size_t) 1U, NULL, NULL, NULL,
                              sodium_base64_VARIANT_ORIGINAL_NO_PADDING) == -1);
 
+    assert(sodium_base642bin(buf1, sizeof buf1, "kaw", (size_t) 3U, NULL, NULL, NULL,
+                             sodium_base64_VARIANT_ORIGINAL) == -1);
+    assert(sodium_base642bin(buf1, sizeof buf1, "kQ*", (size_t) 3U, "@", NULL, NULL,
+                             sodium_base64_VARIANT_ORIGINAL) == -1);
+    assert(sodium_base642bin(buf1, sizeof buf1, "kQ*", (size_t) 3U, "*", NULL, NULL,
+                             sodium_base64_VARIANT_ORIGINAL) == -1);
+    assert(sodium_base642bin(buf1, sizeof buf1, "kaw=**", (size_t) 6U, "*", NULL, NULL,
+                             sodium_base64_VARIANT_ORIGINAL) == 0);
+    assert(sodium_base642bin(buf1, sizeof buf1, "kaw*=*", (size_t) 6U, "~*", NULL, NULL,
+                             sodium_base64_VARIANT_ORIGINAL) == 0);
+    assert(sodium_base642bin(buf1, sizeof buf1, "ka*w*=*", (size_t) 7U, "*~", NULL, NULL,
+                             sodium_base64_VARIANT_ORIGINAL) == 0);
+
     for (i = 0; i < 1000; i++) {
         assert(sizeof buf1 >= 100);
         bin_len = (size_t) randombytes_uniform(100);