diff --git a/tests/test-marray.c b/tests/test-marray.c
index 866e0f67..d3a5f25c 100644
--- a/tests/test-marray.c
+++ b/tests/test-marray.c
@@ -277,6 +277,14 @@ static void test_mpz(void)
     assert(b);
     assert(strcmp(sp, "") == 0);
     assert(array_mpz_equal_p(array1, array2));
+
+    b = array_mpz_parse_str(array2, "[", &sp);
+    assert(!b);
+    b = array_mpz_parse_str(array2, "[17,", &sp);
+    assert(!b);
+    b = array_mpz_parse_str(array2, "[17,18", &sp);
+    assert(!b);
+
     // NOTE: Not the same order than list...
     }
 
diff --git a/tests/test-mdict.c b/tests/test-mdict.c
index d3f76441..bdf5b051 100644
--- a/tests/test-mdict.c
+++ b/tests/test-mdict.c
@@ -174,6 +174,22 @@ static void check_io(void)
     string_set_str (str, " { ] ");
     b = dict_str_parse_str(dict2, string_get_cstr(str), &sp);
     assert (!b);
+
+    string_set_str (str, " {  \"LICENCE\" : \"BSD3\" ");
+    b = dict_str_parse_str(dict2, string_get_cstr(str), &sp);
+    assert (!b);
+
+    string_set_str (str, " {  \"LICENCE\" :");
+    b = dict_str_parse_str(dict2, string_get_cstr(str), &sp);
+    assert (!b);
+
+    string_set_str (str, " {  \"LICENCE\"");
+    b = dict_str_parse_str(dict2, string_get_cstr(str), &sp);
+    assert (!b);
+
+    string_set_str (str, " { ");
+    b = dict_str_parse_str(dict2, string_get_cstr(str), &sp);
+    assert (!b);
   }
 }
 
diff --git a/tests/test-msnapshot.c b/tests/test-msnapshot.c
index e0c6fb45..109eb6a9 100644
--- a/tests/test-msnapshot.c
+++ b/tests/test-msnapshot.c
@@ -38,7 +38,7 @@ typedef struct {
 } data_t;
 
 static void data_crc(data_t *p) { p->p = 0-p->n; p->c = ~p->n; }
-static void data_init(data_t *p) { p->n = 0; p->spare1 = 0; p->spare2 = 0; data_crc(p); p->v = calloc(1, 1); assert(p->v); }
+static void data_init(data_t *p) { p->n = 0; p->spare1 = 0; p->spare2 = 0; data_crc(p); p->v = calloc(1, 1); assert(p->v != NULL); }
 static void data_valid_p(const data_t *p) { assert (p->n == (0-p->p) && p->n == ~p->c); }
 static void data_clear(data_t *p) { free(p->v); }
 static void data_set(data_t *p, data_t o) { p->n = o.n; data_crc(p); }