diff --git a/clang-tools-extra/clang-tidy/readability/ContainerSizeEmptyCheck.cpp b/clang-tools-extra/clang-tidy/readability/ContainerSizeEmptyCheck.cpp
--- a/clang-tools-extra/clang-tidy/readability/ContainerSizeEmptyCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/ContainerSizeEmptyCheck.cpp
@@ -166,9 +166,11 @@
       this);
 
   // Comparison to empty string or empty constructor.
-  const auto WrongComparend = anyOf(
-      stringLiteral(hasSize(0)), cxxConstructExpr(isDefaultConstruction()),
-      cxxUnresolvedConstructExpr(argumentCountIs(0)));
+  const auto WrongComparend =
+      anyOf(stringLiteral(hasSize(0)),
+            userDefinedLiteral(hasDescendant(stringLiteral(hasSize(0)))),
+            cxxConstructExpr(isDefaultConstruction()),
+            cxxUnresolvedConstructExpr(argumentCountIs(0)));
   // Match the object being compared.
   const auto STLArg =
       anyOf(unaryOperator(
diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/container-size-empty.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/container-size-empty.cpp
--- a/clang-tools-extra/test/clang-tidy/checkers/readability/container-size-empty.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/readability/container-size-empty.cpp
@@ -22,6 +22,10 @@
 };
 }
 
+namespace string_literals{
+string operator""s(const char *, size_t);
+}
+
 }
 
 template <typename T>
@@ -770,3 +774,17 @@
 bool testIgnoredDummyType(const IgnoredDummyType& value) {
   return value == IgnoredDummyType();
 }
+
+bool testStringLiterals(const std::string& s)
+{
+  using namespace std::string_literals;
+  return s == ""s;
+  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: the 'empty' method should be used
+  // CHECK-FIXES: {{^  }}return s.empty()
+}
+
+bool testNotEmptyStringLiterals(const std::string& s)
+{
+  using namespace std::string_literals;
+  return s == "foo"s;
+}
\ No newline at end of file