diff --git a/implementations/python/tests/samples.bin b/implementations/python/tests/samples.bin
index dbb41bf..d6008aa 100644
Binary files a/implementations/python/tests/samples.bin and b/implementations/python/tests/samples.bin differ
diff --git a/implementations/python/tests/samples.pr b/implementations/python/tests/samples.pr
index df8ae0b..a390467 100644
--- a/implementations/python/tests/samples.pr
+++ b/implementations/python/tests/samples.pr
@@ -118,6 +118,7 @@
   float14: @"+qNaN" <Test #x"87047fc00111" #xf"7fc00111">
   float15: @"-qNaN" <Test #x"8704ffc00001" #xf"ffc00001">
   float16: @"-qNaN" <Test #x"8704ffc00111" #xf"ffc00111">
+  int-98765432109876543210987654321098765432109: <Test #x"b012feddc125aed4226c770369269596ce3f0ad3" -98765432109876543210987654321098765432109>
   int-12345678123456781234567812345678: <Test #x"b00eff642cf6684f11d1dad08c4a10b2" -12345678123456781234567812345678>
   int-1234567812345678123456781234567: <Test #x"b00df06ae570d4b4fb62ae746dce79" -1234567812345678123456781234567>
   int-257: <Test #x"b002feff" -257>
@@ -151,6 +152,7 @@
   int1234567812345678123456781234567: <Test #x"b00d0f951a8f2b4b049d518b923187" 1234567812345678123456781234567>
   int12345678123456781234567812345678: <Test #x"b00e009bd30997b0ee2e252f73b5ef4e" 12345678123456781234567812345678>
   int87112285931760246646623899502532662132736: <Test #x"b012010000000000000000000000000000000000" 87112285931760246646623899502532662132736>
+  int98765432109876543210987654321098765432109: <Test #x"b01201223eda512bdd9388fc96d96a6931c0f52d" 98765432109876543210987654321098765432109>
   list0: <Test #x"b584" []>
   list4: <Test #x"b5b00101b00102b00103b0010484" [1 2 3 4]>
   list4a: <Test #x"b5b00101b00102b00103b0010484" [1, 2, 3, 4]>
diff --git a/implementations/racket/preserves/preserves/tests/samples.pr b/implementations/racket/preserves/preserves/tests/samples.pr
index df8ae0b..a390467 100644
--- a/implementations/racket/preserves/preserves/tests/samples.pr
+++ b/implementations/racket/preserves/preserves/tests/samples.pr
@@ -118,6 +118,7 @@
   float14: @"+qNaN" <Test #x"87047fc00111" #xf"7fc00111">
   float15: @"-qNaN" <Test #x"8704ffc00001" #xf"ffc00001">
   float16: @"-qNaN" <Test #x"8704ffc00111" #xf"ffc00111">
+  int-98765432109876543210987654321098765432109: <Test #x"b012feddc125aed4226c770369269596ce3f0ad3" -98765432109876543210987654321098765432109>
   int-12345678123456781234567812345678: <Test #x"b00eff642cf6684f11d1dad08c4a10b2" -12345678123456781234567812345678>
   int-1234567812345678123456781234567: <Test #x"b00df06ae570d4b4fb62ae746dce79" -1234567812345678123456781234567>
   int-257: <Test #x"b002feff" -257>
@@ -151,6 +152,7 @@
   int1234567812345678123456781234567: <Test #x"b00d0f951a8f2b4b049d518b923187" 1234567812345678123456781234567>
   int12345678123456781234567812345678: <Test #x"b00e009bd30997b0ee2e252f73b5ef4e" 12345678123456781234567812345678>
   int87112285931760246646623899502532662132736: <Test #x"b012010000000000000000000000000000000000" 87112285931760246646623899502532662132736>
+  int98765432109876543210987654321098765432109: <Test #x"b01201223eda512bdd9388fc96d96a6931c0f52d" 98765432109876543210987654321098765432109>
   list0: <Test #x"b584" []>
   list4: <Test #x"b5b00101b00102b00103b0010484" [1 2 3 4]>
   list4a: <Test #x"b5b00101b00102b00103b0010484" [1, 2, 3, 4]>
diff --git a/implementations/rust/preserves/src/value/packed/writer.rs b/implementations/rust/preserves/src/value/packed/writer.rs
index 72d6294..0fad0b2 100644
--- a/implementations/rust/preserves/src/value/packed/writer.rs
+++ b/implementations/rust/preserves/src/value/packed/writer.rs
@@ -289,7 +289,7 @@ impl Writer for BinaryOrderWriter {
 macro_rules! fits_in_bytes {
     ($v:ident, $limit:literal) => {{
         let bits = $limit * 8 - 1;
-        $v >= -(2 << bits) && $v < (2 << bits)
+        $v >= -(1 << bits) && $v < (1 << bits)
     }};
 }
 
diff --git a/tests/samples.bin b/tests/samples.bin
index dbb41bf..d6008aa 100644
Binary files a/tests/samples.bin and b/tests/samples.bin differ
diff --git a/tests/samples.pr b/tests/samples.pr
index df8ae0b..a390467 100644
--- a/tests/samples.pr
+++ b/tests/samples.pr
@@ -118,6 +118,7 @@
   float14: @"+qNaN" <Test #x"87047fc00111" #xf"7fc00111">
   float15: @"-qNaN" <Test #x"8704ffc00001" #xf"ffc00001">
   float16: @"-qNaN" <Test #x"8704ffc00111" #xf"ffc00111">
+  int-98765432109876543210987654321098765432109: <Test #x"b012feddc125aed4226c770369269596ce3f0ad3" -98765432109876543210987654321098765432109>
   int-12345678123456781234567812345678: <Test #x"b00eff642cf6684f11d1dad08c4a10b2" -12345678123456781234567812345678>
   int-1234567812345678123456781234567: <Test #x"b00df06ae570d4b4fb62ae746dce79" -1234567812345678123456781234567>
   int-257: <Test #x"b002feff" -257>
@@ -151,6 +152,7 @@
   int1234567812345678123456781234567: <Test #x"b00d0f951a8f2b4b049d518b923187" 1234567812345678123456781234567>
   int12345678123456781234567812345678: <Test #x"b00e009bd30997b0ee2e252f73b5ef4e" 12345678123456781234567812345678>
   int87112285931760246646623899502532662132736: <Test #x"b012010000000000000000000000000000000000" 87112285931760246646623899502532662132736>
+  int98765432109876543210987654321098765432109: <Test #x"b01201223eda512bdd9388fc96d96a6931c0f52d" 98765432109876543210987654321098765432109>
   list0: <Test #x"b584" []>
   list4: <Test #x"b5b00101b00102b00103b0010484" [1 2 3 4]>
   list4a: <Test #x"b5b00101b00102b00103b0010484" [1, 2, 3, 4]>