diff -r aa55109f01d0 -r a1a728d7ebfd tests/test_json.c
--- a/tests/test_json.c	Sun Dec 14 14:15:26 2025 +0100
+++ b/tests/test_json.c	Sun Dec 14 14:29:27 2025 +0100
@@ -1676,8 +1676,7 @@
     }
     
     CX_TEST_DO {
-        // TODO: only the first test works yet, change i<1 to i<10 for all tests
-        for(int i=0;i<1;i++) {
+        for(unsigned i=0;i<cx_nmemb(a);i++) {
             CX_TEST_ASSERT(cxJsonIsObject(a[i]));
             
             CxJsonValue *b = cxJsonClone(a[i], NULL);
@@ -1686,10 +1685,11 @@
             CX_TEST_ASSERT(b->type == a[i]->type);
             CX_TEST_ASSERT(cxJsonCompare(a[i], b) == 0);
             
-            // TODO: cxJsonToString(b, NULL) segfaults
-            //cxmutstr a_str = cxJsonToString(a[i], NULL);
-            //cxmutstr b_str = cxJsonToString(b, NULL);
-            //CX_TEST_ASSERT(cx_strcmp(a_str, b_str) == 0);
+            cxmutstr a_str = cxJsonToString(a[i], NULL);
+            cxmutstr b_str = cxJsonToString(b, NULL);
+            CX_TEST_ASSERT(cx_strcmp(a_str, b_str) == 0);
+            cx_strfree(&a_str);
+            cx_strfree(&b_str);
             
             cxJsonValueFree(b);
         }
@@ -1710,8 +1710,7 @@
     cxJsonFromString(NULL, "[ { \"array\": [ 1,2,3 ]}  ]", &a[5]);
     
     CX_TEST_DO {
-        // TODO: only the first 4 tests work. Change i<4 to i<6
-        for(int i=0;i<4;i++) {
+        for(unsigned i=0;i<cx_nmemb(a);i++) {
             CX_TEST_ASSERT(cxJsonIsArray(a[i]));
             
             CxJsonValue *b = cxJsonClone(a[i], NULL);
@@ -1719,11 +1718,12 @@
             CX_TEST_ASSERT(cxJsonIsArray(b));
             CX_TEST_ASSERT(cxJsonCompare(a[i], b) == 0);
             
-            // TODO: enable when cxJsonToString(b, NULL) works
-            //cxmutstr a_str = cxJsonToString(a[i], NULL);
-            //cxmutstr b_str = cxJsonToString(b, NULL);
-            //CX_TEST_ASSERT(cx_strcmp(a_str, b_str) == 0);
-            
+            cxmutstr a_str = cxJsonToString(a[i], NULL);
+            cxmutstr b_str = cxJsonToString(b, NULL);
+            CX_TEST_ASSERT(cx_strcmp(a_str, b_str) == 0);
+            cx_strfree(&a_str);
+            cx_strfree(&b_str);
+
             cxJsonValueFree(b);
         }
     }