diff --git a/tests-clay/clay.h b/tests-clay/clay.h
index 812209be1..3db9600b3 100644
--- a/tests-clay/clay.h
+++ b/tests-clay/clay.h
@@ -59,6 +59,7 @@ void cl_fixture_cleanup(const char *fixture_name);
  */
 extern void test_buf_basic__printf(void);
 extern void test_buf_basic__resize(void);
+extern void test_config_new__write_new_config(void);
 extern void test_config_stress__cleanup(void);
 extern void test_config_stress__dont_break_on_invalid_input(void);
 extern void test_config_stress__initialize(void);
diff --git a/tests-clay/clay_main.c b/tests-clay/clay_main.c
index 6d964b1ba..2f9a49d36 100644
--- a/tests-clay/clay_main.c
+++ b/tests-clay/clay_main.c
@@ -108,6 +108,9 @@ static const struct clay_func _clay_cb_buf_basic[] = {
     {"printf", &test_buf_basic__printf},
 	{"resize", &test_buf_basic__resize}
 };
+static const struct clay_func _clay_cb_config_new[] = {
+    {"write_new_config", &test_config_new__write_new_config}
+};
 static const struct clay_func _clay_cb_config_stress[] = {
     {"dont_break_on_invalid_input", &test_config_stress__dont_break_on_invalid_input}
 };
@@ -227,6 +230,12 @@ static const struct clay_suite _clay_suites[] = {
         {NULL, NULL},
         {NULL, NULL},
         _clay_cb_buf_basic, 2
+    },
+	{
+        "config::new",
+        {NULL, NULL},
+        {NULL, NULL},
+        _clay_cb_config_new, 1
     },
 	{
         "config::stress",
@@ -362,8 +371,8 @@ static const struct clay_suite _clay_suites[] = {
     }
 };
 
-static size_t _clay_suite_count = 23;
-static size_t _clay_callback_count = 70;
+static size_t _clay_suite_count = 24;
+static size_t _clay_callback_count = 71;
 
 /* Core test functions */
 static void
diff --git a/tests-clay/config/new.c b/tests-clay/config/new.c
new file mode 100644
index 000000000..285cc4af8
--- /dev/null
+++ b/tests-clay/config/new.c
@@ -0,0 +1,36 @@
+#include "clay_libgit2.h"
+
+#include "filebuf.h"
+#include "fileops.h"
+#include "posix.h"
+
+#define TEST_CONFIG "git-new-config"
+
+void test_config_new__write_new_config(void)
+{
+	const char *out;
+	struct git_config_file *file;
+	git_config *config;
+
+	cl_git_pass(git_config_file__ondisk(&file, TEST_CONFIG));
+	cl_git_pass(git_config_new(&config));
+	cl_git_pass(git_config_add_file(config, file, 0));
+
+	cl_git_pass(git_config_set_string(config, "color.ui", "auto"));
+	cl_git_pass(git_config_set_string(config, "core.editor", "ed"));
+
+	git_config_free(config);
+
+	cl_git_pass(git_config_file__ondisk(&file, TEST_CONFIG));
+	cl_git_pass(git_config_new(&config));
+	cl_git_pass(git_config_add_file(config, file, 0));
+
+	cl_git_pass(git_config_get_string(config, "color.ui", &out));
+	cl_assert(strcmp(out, "auto") == 0);
+	cl_git_pass(git_config_get_string(config, "core.editor", &out));
+	cl_assert(strcmp(out, "ed") == 0);
+
+	git_config_free(config);
+
+	p_unlink(TEST_CONFIG);
+}