diff --git a/test/error/fail06.json b/test/error/fail06.json
new file mode 100644
index 000000000..ed91580e1
--- /dev/null
+++ b/test/error/fail06.json
@@ -0,0 +1 @@
+[   , "<-- missing value"]
\ No newline at end of file
diff --git a/test/error/fail25.json b/test/error/fail25.json
new file mode 100644
index 000000000..8b7ad23e0
--- /dev/null
+++ b/test/error/fail25.json
@@ -0,0 +1 @@
+["	tab	character	in	string	"]
\ No newline at end of file
diff --git a/test/error/fail27.json b/test/error/fail27.json
new file mode 100644
index 000000000..6b01a2ca4
--- /dev/null
+++ b/test/error/fail27.json
@@ -0,0 +1,2 @@
+["line
+break"]
\ No newline at end of file
diff --git a/test/error/fail28.json b/test/error/fail28.json
new file mode 100644
index 000000000..621a0101c
--- /dev/null
+++ b/test/error/fail28.json
@@ -0,0 +1,2 @@
+["line\
+break"]
\ No newline at end of file
diff --git a/test/unit.cpp b/test/unit.cpp
index 7644c9041..236e1f93d 100644
--- a/test/unit.cpp
+++ b/test/unit.cpp
@@ -8456,13 +8456,11 @@ TEST_CASE("regression tests")
         SECTION("NAN value")
         {
             CHECK(json(NAN) == json());
-            CHECK(json(static_cast<long double>(NAN)) == json());
         }
 
         SECTION("infinity")
         {
             CHECK(json(INFINITY) == json());
-            CHECK(json(static_cast<long double>(INFINITY)) == json());
         }
     }
 }