diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 4b72c62..70b7462 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -15,6 +15,7 @@ if(ENABLE_CJSON_TEST)
         parse_object
         parse_value
         print_string
+        print_number
     )
 
     add_library(test-common common.c)
diff --git a/tests/print_number.c b/tests/print_number.c
new file mode 100644
index 0000000..e0141b6
--- /dev/null
+++ b/tests/print_number.c
@@ -0,0 +1,103 @@
+/*
+  Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include "unity/examples/unity_config.h"
+#include "unity/src/unity.h"
+#include "common.h"
+
+static void assert_print_number(const char *expected, double input)
+{
+    unsigned char printed[1024];
+    cJSON item[1];
+    printbuffer buffer;
+    buffer.buffer = printed;
+    buffer.length = sizeof(printed);
+    buffer.offset = 0;
+    buffer.noalloc = true;
+
+    memset(item, 0, sizeof(item));
+    cJSON_SetNumberValue(item, input);
+
+    TEST_ASSERT_NOT_NULL_MESSAGE(print_number(item, &buffer), "Failed to print number.");
+    TEST_ASSERT_EQUAL_STRING_MESSAGE(expected, buffer.buffer, "Printed number is not as expected.");
+}
+
+static void print_number_should_print_zero(void)
+{
+    assert_print_number("0", 0);
+}
+
+static void print_number_should_print_negative_integers(void)
+{
+    assert_print_number("-1", -1);
+    assert_print_number("-32768", -32768);
+    assert_print_number("-2147483648", -2147483648);
+}
+
+static void print_number_should_print_positive_integers(void)
+{
+    assert_print_number("1", 1);
+    assert_print_number("32767", 32767);
+    assert_print_number("2147483647", 2147483647);
+}
+
+static void print_number_should_print_positive_reals(void)
+{
+    assert_print_number("0.123000", 0.123);
+    assert_print_number("1.000000e-09", 10e-10);
+    assert_print_number("1000000000000", 10e11);
+    assert_print_number("1.230000e+129", 123e+127);
+    assert_print_number("0", 123e-128); /* TODO: Maybe this shouldn't be 0 */
+}
+
+static void print_number_should_print_negative_reals(void)
+{
+    assert_print_number("-0.012300", -0.0123);
+    assert_print_number("-1.000000e-09", -10e-10);
+    assert_print_number("-1000000000000000000000", -10e20);
+    assert_print_number("-1.230000e+129", -123e+127);
+    assert_print_number("-1.230000e-126", -123e-128);
+}
+
+static void print_number_should_print_non_number(void)
+{
+    TEST_IGNORE();
+    /* FIXME: Cannot test this easily in C89! */
+    /* assert_print_number("null", NaN); */
+    /* assert_print_number("null", INFTY); */
+    /* assert_print_number("null", -INFTY); */
+}
+
+int main(void)
+{
+    /* initialize cJSON item */
+    UNITY_BEGIN();
+
+    RUN_TEST(print_number_should_print_zero);
+    RUN_TEST(print_number_should_print_negative_integers);
+    RUN_TEST(print_number_should_print_positive_integers);
+    RUN_TEST(print_number_should_print_positive_reals);
+    RUN_TEST(print_number_should_print_negative_reals);
+    RUN_TEST(print_number_should_print_non_number);
+
+    return UNITY_END();
+}