diff --git a/src/template.h b/src/template.h
index e87d8d95..bf44267d 100644
--- a/src/template.h
+++ b/src/template.h
@@ -232,10 +232,6 @@ public:
   ImmutableString(const char *s, size_t slen)
       : len(slen), base(copystr(s, len)) {}
   ImmutableString(const char *s) : len(strlen(s)), base(copystr(s, len)) {}
-  ImmutableString(std::unique_ptr<char[]> s)
-      : len(strlen(s.get())), base(len == 0 ? "" : s.release()) {}
-  ImmutableString(std::unique_ptr<char[]> s, size_t slen)
-      : len(slen), base(len == 0 ? "" : s.release()) {}
   ImmutableString(const std::string &s)
       : len(s.size()), base(copystr(s.c_str(), s.size())) {}
   template <typename InputIt>
diff --git a/src/template_test.cc b/src/template_test.cc
index 6a1f0fc8..70050888 100644
--- a/src/template_test.cc
+++ b/src/template_test.cc
@@ -50,20 +50,16 @@ void test_template_immutable_string(void) {
   CU_ASSERT(std::string("alpha") == from_cstr);
   CU_ASSERT(from_cstr == std::string("alpha"));
 
-  ImmutableString from_uniq(strcopy("charlie"));
-
-  CU_ASSERT("charlie" == from_uniq);
-  CU_ASSERT(7 == from_uniq.size());
-
   // copy constructor
-  ImmutableString copy = from_uniq;
+  ImmutableString src("charlie");
+  ImmutableString copy = src;
 
   CU_ASSERT("charlie" == copy);
   CU_ASSERT(7 == copy.size());
 
   // copy assignment
   ImmutableString copy2;
-  copy2 = from_uniq;
+  copy2 = src;
 
   CU_ASSERT("charlie" == copy2);
   CU_ASSERT(7 == copy2.size());