diff --git a/test/unittest/readertest.cpp b/test/unittest/readertest.cpp
index ac0cb313..17546da6 100644
--- a/test/unittest/readertest.cpp
+++ b/test/unittest/readertest.cpp
@@ -449,7 +449,8 @@ TEST(Reader, ParseNumber_NormalPrecisionError) {
 TEST(Reader, ParseNumber_Error) {
 #define TEST_NUMBER_ERROR(errorCode, str, errorOffset, streamPos) \
     { \
-        char buffer[1001]; \
+        char buffer[2048]; \
+        ASSERT_LT(std::strlen(str), 2048u); \
         sprintf(buffer, "%s", str); \
         InsituStringStream s(buffer); \
         BaseReaderHandler<> h; \
@@ -498,6 +499,41 @@ TEST(Reader, ParseNumber_Error) {
         "03685473724737236837236775297525854775297525472975254737236873720170151235473783"
         "7236737247372368772473723683723456789012E66", 0, 283);
 
+    // Half way between max-normal and infinity
+    // Should round to infinity in nearest-even mode.
+    TEST_NUMBER_ERROR(kParseErrorNumberTooBig,
+        "1.797693134862315807937289714053034150799341327100378269361737789804449682927647"
+        "50946649017977587207096330286416692887910946555547851940402630657488671505820681"
+        "90890200070838367627385484581771153176447573027006985557136695962284291481986083"
+        "49364752927190741684443655107043427115596995080930428801779041744977920000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000e+308", 0, 1125);
+    // ...round up
+    TEST_NUMBER_ERROR(kParseErrorNumberTooBig,
+        "1.797693134862315807937289714053034150799341327100378269361737789804449682927647"
+        "50946649017977587207096330286416692887910946555547851940402630657488671505820681"
+        "90890200070838367627385484581771153176447573027006985557136695962284291481986083"
+        "49364752927190741684443655107043427115596995080930428801779041744977920000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000000"
+        "00000000000000000000000000000000000000000000000000000000000000000000000000000001e+308", 0, 1125);
+
 #undef TEST_NUMBER_ERROR
 }