diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 7d84442..e339602 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -28,6 +28,8 @@ set(ALL_TEST_NAMES
     test_null
     test_null_keys_add
     test_null_keys_get
+    test_null_keys_del
+    test_null_keys_print
     test_parse
     test_parse_int64
     test_printbuf
diff --git a/tests/test_null_keys_del.c b/tests/test_null_keys_del.c
new file mode 100644
index 0000000..a2f9c34
--- /dev/null
+++ b/tests/test_null_keys_del.c
@@ -0,0 +1,100 @@
+/*
+ * Tests if binary strings are supported.
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+
+#include "json_inttypes.h"
+#include "json_object.h"
+#include "json_tokener.h"
+
+int main(void)
+{
+	/* this test has embedded null characters in the key and value.
+	 * check that it's still included after deserializing. */
+	const char *input = "{ \"biff\\u0000\": null, \"\\u0000zxcvbnm\": 178 }";
+	const char *expected_biff = "biff\0";
+	const int expected_biff_len = 5;
+	const char *expected_biff_printable = "biff\\u0000";
+	const char *expected_zxcv = "\0zxcvbnm";
+	const int expected_zxcv_len = 8;
+	const char *expected_zxcv_printable = "\\u0000zxcvbnm";
+
+	struct json_object *parsed = json_tokener_parse(input);
+	struct json_object *val;
+	json_bool key_present;
+
+	printf("Parsed input: %s\n", input);
+	printf("Result is ");
+	if (parsed == NULL)
+	{
+		printf("NULL (error!)\n");
+		return 1; // Error somewhere
+	}
+	else if (!json_object_is_type(parsed, json_type_object))
+	{
+		printf("not `json_type_object` (error!)\n");
+		return 1; // Error somewhere
+	}
+	else
+	{
+		printf("`json_type_object`\n");
+	}
+
+	// Check nothing odd happened in parsing
+	if (json_object_object_length(parsed) != 2)
+	{
+		printf("Should contain two fields (has %d) (error!)",
+		       json_object_object_length(parsed));
+		return 1;
+	}
+
+	key_present = json_object_object_get_ex_len(parsed, expected_biff, expected_biff_len, &val);
+	if (!key_present || !json_object_is_type(val, json_type_null))
+	{
+		printf("The key \"%s\" should be present and should be NULL (error!)\n",
+		       expected_biff_printable);
+		return 1;
+	}
+	key_present = json_object_object_get_ex_len(parsed, expected_zxcv, expected_zxcv_len, &val);
+	if (!key_present || !json_object_is_type(val, json_type_int) ||
+	    json_object_get_int(val) != 178)
+	{
+		printf("The key \"%s\" should be present and should be 178 (error!)\n",
+		       expected_zxcv_printable);
+		return 1;
+	}
+	printf("Expected keys (\"%s\" and \"%s\") present with expected values\n",
+	       expected_biff_printable, expected_zxcv_printable);
+
+	// Delete one key
+	json_object_object_del_len(parsed, expected_zxcv, expected_zxcv_len);
+
+	// Check it is gone
+	if (json_object_object_length(parsed) != 1)
+	{
+		printf("Should contain only one field (has %d) (error!)",
+		       json_object_object_length(parsed));
+		return 1;
+	}
+	key_present = json_object_object_get_ex_len(parsed, expected_biff, expected_biff_len, &val);
+	if (!key_present || !json_object_is_type(val, json_type_null))
+	{
+		printf("The key \"%s\" should be present and should be NULL (error!)\n",
+		       expected_biff_printable);
+		return 1;
+	}
+	key_present = json_object_object_get_ex_len(parsed, expected_zxcv, expected_zxcv_len, &val);
+	if (key_present)
+	{
+		printf("The key \"%s\" should not be present (error!)\n", expected_zxcv_printable);
+		return 1;
+	}
+	printf("Key deleted properly\n");
+
+	json_object_put(parsed);
+	printf("PASS\n");
+	return 0;
+}
diff --git a/tests/test_null_keys_del.expected b/tests/test_null_keys_del.expected
new file mode 100644
index 0000000..44f1682
--- /dev/null
+++ b/tests/test_null_keys_del.expected
@@ -0,0 +1,5 @@
+Parsed input: { "biff\u0000": null, "\u0000zxcvbnm": 178 }
+Result is `json_type_object`
+Expected keys ("biff\0" and "\0zxcvbnm") present with expected values
+Key deleted properly
+PASS
diff --git a/tests/test_null_keys_del.test b/tests/test_null_keys_del.test
new file mode 120000
index 0000000..58a13f4
--- /dev/null
+++ b/tests/test_null_keys_del.test
@@ -0,0 +1 @@
+test_basic.test
\ No newline at end of file
diff --git a/tests/test_null_keys_get.c b/tests/test_null_keys_get.c
index d63f579..b0c7d26 100644
--- a/tests/test_null_keys_get.c
+++ b/tests/test_null_keys_get.c
@@ -19,7 +19,7 @@ int main(void)
 	const int expected_key_len = 7;
 	const char *expected_key_printable = "foo\\0bar";
 	const char *expected_value = "qwerty\0asdf";
-	const int expected_value_len = 12;
+	const int expected_value_len = 11;
 	const char *expected_value_printable = "qwerty\\0asdf";
 
 	struct json_object *parsed = json_tokener_parse(input);
diff --git a/tests/test_null_keys_print.c b/tests/test_null_keys_print.c
new file mode 100644
index 0000000..03b74c8
--- /dev/null
+++ b/tests/test_null_keys_print.c
@@ -0,0 +1,18 @@
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "json.h"
+#include "parse_flags.h"
+
+int main(int argc, char **argv)
+{
+	struct json_object *new_obj;
+
+	new_obj = json_tokener_parse("{ \"foo\\u0000bar\": \"qwerty\\u0000asdf\" }");
+	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
+	json_object_put(new_obj);
+
+	return EXIT_SUCCESS;
+}
diff --git a/tests/test_null_keys_print.expected b/tests/test_null_keys_print.expected
new file mode 100644
index 0000000..0af8163
--- /dev/null
+++ b/tests/test_null_keys_print.expected
@@ -0,0 +1 @@
+new_obj.to_string()={ "foo\u0000bar": "qwerty\u0000asdf" }
diff --git a/tests/test_null_keys_print.test b/tests/test_null_keys_print.test
new file mode 120000
index 0000000..58a13f4
--- /dev/null
+++ b/tests/test_null_keys_print.test
@@ -0,0 +1 @@
+test_basic.test
\ No newline at end of file