diff --git a/tests/regression/issue1004.rs b/tests/regression/issue1004.rs
new file mode 100644
index 000000000..d2c3e74c0
--- /dev/null
+++ b/tests/regression/issue1004.rs
@@ -0,0 +1,9 @@
+#![cfg(feature = "arbitrary_precision")]
+
+#[test]
+fn test() {
+    let float = 5.55f32;
+    let value = serde_json::to_value(&float).unwrap();
+    let json = serde_json::to_string(&value).unwrap();
+    assert_eq!(json, "5.550000190734863"); // FIXME
+}