diff --git a/test/std/string/camel_case_test.ds b/test/std/string/camel_case_test.ds
new file mode 100644
index 0000000..dc19d9c
--- /dev/null
+++ b/test/std/string/camel_case_test.ds
@@ -0,0 +1,12 @@
+
+fn test_without_symbols
+    output = camel_case "hello world 22"
+
+    assert_eq ${output} "HelloWorld22"
+end
+
+fn test_with_symbols
+    output = camel_case "hello!@#$% world^&*()[]{}22"
+
+    assert_eq ${output} "HelloWorld22"
+end
diff --git a/test/std/string/snake_case_test.ds b/test/std/string/snake_case_test.ds
new file mode 100644
index 0000000..1ee9947
--- /dev/null
+++ b/test/std/string/snake_case_test.ds
@@ -0,0 +1,12 @@
+
+fn test_without_symbols
+    output = snake_case "hello world 22"
+
+    assert_eq ${output} "hello_world_22"
+end
+
+fn test_with_symbols
+    output = snake_case "hello!@#$% world^&*()[]{}22"
+
+    assert_eq ${output} "hello_world_22"
+end