diff --git a/ext/standard/tests/serialize/bug24063.phpt b/ext/standard/tests/serialize/bug24063.phpt
index e1cdfecf557..3cca101cbbb 100644
--- a/ext/standard/tests/serialize/bug24063.phpt
+++ b/ext/standard/tests/serialize/bug24063.phpt
@@ -16,8 +16,8 @@ for ($i = 1; $i < 10; $i++) {
 0.01 0.01
 0.001 0.001
 0.0001 0.0001
-1E-05 1E-05
-1E-06 1E-06
-1E-07 1E-07
-1E-08 1E-08
-1E-09 1E-09
+1.0E-5 1.0E-5
+1.0E-6 1.0E-6
+1.0E-7 1.0E-7
+1.0E-8 1.0E-8
+1.0E-9 1.0E-9