diff --git a/Examples/test-suite/python/overload_simple_cast_runme.py b/Examples/test-suite/python/overload_simple_cast_runme.py
index 1312e5a38..95fd57aa4 100644
--- a/Examples/test-suite/python/overload_simple_cast_runme.py
+++ b/Examples/test-suite/python/overload_simple_cast_runme.py
@@ -161,7 +161,7 @@ if s.type != "void *":
 
 # unsigned long long
 ullmax = 9223372036854775807 #0xffffffffffffffff
-ullmaxd = 9223372036854775807.0
+ullmaxd = 922337203685477580.0
 ullmin = 0
 ullmind = 0.0
 if ull(ullmin) != ullmin:
@@ -175,9 +175,10 @@ if ull(ullmaxd) != ullmaxd:
 
 # long long
 llmax = 9223372036854775807 #0x7fffffffffffffff
-llmaxd = 9223372036854775807.0
 llmin = -9223372036854775808
-llmind = -9223372036854775808.0
+# these are near the largest  floats we can still convert into long long
+llmaxd = 922337203685477580.0
+llmind = -922337203685477580.0
 if ll(llmin) != llmin:
     raise runtimeerror, "ll(llmin)"
 if ll(llmax) != llmax: