diff --git a/include/gargoyle/test/twine.h b/include/gargoyle/test/twine.h
index 89124e4..933ff98 100644
--- a/include/gargoyle/test/twine.h
+++ b/include/gargoyle/test/twine.h
@@ -6,6 +6,6 @@ int clean_suite_twine(void);
 void twine_test_is_sep(void);
 void twine_test_is_eql(void);
 void twine_test_cmp(void);
-//void twine_test_cpy(void);
+void twine_test_cpy(void);
 
 #endif
diff --git a/test/runner.c b/test/runner.c
index b28bef8..2a509b1 100644
--- a/test/runner.c
+++ b/test/runner.c
@@ -11,7 +11,7 @@ int main() {
     { "gargoyle_is_sep", twine_test_is_sep },
     { "gargoyle_is_eql", twine_test_is_eql },
     { "gargoyle_cmp", twine_test_cmp },
-//    { "gargoyle_cpy", twine_test_cpy },
+    { "gargoyle_cpy", twine_test_cpy },
     CU_TEST_INFO_NULL,
   };
 
diff --git a/test/twine.c b/test/twine.c
index 0af21b4..d1e7768 100644
--- a/test/twine.c
+++ b/test/twine.c
@@ -49,3 +49,25 @@ void twine_test_cmp(void) {
   CU_ASSERT_FALSE(gargoyle_cmp("_", "-", 1, 0));
   CU_ASSERT_TRUE(gargoyle_cmp("_", "-", 1, GARGOYLE_FLG_FLXBL));
 }
+
+void twine_test_cpy(void) {
+  char smol_str[10];
+
+  gargoyle_cpy(smol_str, "", sizeof(smol_str), GARGOYLE_FLG_FILL0);
+  CU_ASSERT_NSTRING_EQUAL(smol_str, "\0\0\0\0\0\0\0\0\0\0", 10);
+
+  gargoyle_cpy(smol_str, "waldo", 5, 0);
+  CU_ASSERT_STRING_EQUAL(smol_str, "waldo");
+
+  gargoyle_cpy(smol_str, "hi", 3, GARGOYLE_FLG_FILL0);
+  CU_ASSERT_STRING_EQUAL(smol_str, "hi");
+  CU_ASSERT_NSTRING_EQUAL(smol_str, "hi\0do\0\0\0\0\0", 10);
+
+  gargoyle_cpy(smol_str, "lol", 3, 0);
+  CU_ASSERT_STRING_EQUAL(smol_str, "loldo");
+  CU_ASSERT_NSTRING_EQUAL(smol_str, "loldo\0\0\0\0\0", 10);
+
+  gargoyle_cpy(smol_str + 5, "spooky", 5, GARGOYLE_FLG_FILL0);
+  CU_ASSERT_STRING_EQUAL(smol_str, "loldospoo");
+  CU_ASSERT_NSTRING_EQUAL(smol_str, "loldospoo\0", 10);
+}