diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dc1c727a80cf00513303df7af5400978edc3dec4..96230fc5207b59f3b5f5d87ddd42f985f4496b03 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2005-11-18  Joseph S. Myers  <joseph@codesourcery.com>
+
+	* g++.dg/cpp/string-2.C: New test.
+
 2005-11-18  Zdenek Dvorak  <dvorakz@suse.cz>
 
 	* gcc.dg/tree-ssa/loop-14.c: New test.
diff --git a/gcc/testsuite/g++.dg/cpp/string-2.C b/gcc/testsuite/g++.dg/cpp/string-2.C
new file mode 100644
index 0000000000000000000000000000000000000000..b947c73eea479d7cbbb94e5afea179f5b3bb68b8
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp/string-2.C
@@ -0,0 +1,7 @@
+// Test diagnostics for interpreting strings: should be an error by
+// default.
+// Origin: Joseph Myers <joseph@codesourcery.com>
+// { dg-do compile }
+// { dg-options "" }
+
+const char *s = "\q"; // { dg-error "error: unknown escape sequence" }