diff --git a/subgraph/tests/utils/utils.test.ts b/subgraph/tests/utils/utils.test.ts
index 7040b663..0f9c276c 100644
--- a/subgraph/tests/utils/utils.test.ts
+++ b/subgraph/tests/utils/utils.test.ts
@@ -2,12 +2,28 @@ import {bigIntToBytes32} from '../../src/utils/utils';
 import {BigInt} from '@graphprotocol/graph-ts';
 import {assert, describe, test} from 'matchstick-as/assembly/index';
 
+const ZERO_BYTES32 =
+  '0x0000000000000000000000000000000000000000000000000000000000000000';
+const ONE_BYTES32 =
+  '0x0000000000000000000000000000000000000000000000000000000000000001';
+const HALF_UINT256_BYTES32 =
+  '0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
+const MAX_UINT256_BYTES32 =
+  '0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
+
+const MAX_UINT256_NUMBER_STRING =
+  '115792089237316195423570985008687907853269984665640564039457584007913129639935';
+
 describe('bigIntToBytes32', () => {
-  test('should convert a BigInt to a bytes32 string with 64 zero padding', () => {
-    const input = BigInt.fromI32(123);
-    const expectedOutput =
-      '0x000000000000000000000000000000000000000000000000000000000000007b';
+  test('should successfully convert a range of `bigInt`s', function () {
+    const MAX_UINT256 = BigInt.fromString(MAX_UINT256_NUMBER_STRING);
 
-    assert.stringEquals(bigIntToBytes32(input), expectedOutput);
+    assert.stringEquals(bigIntToBytes32(BigInt.fromString('0')), ZERO_BYTES32);
+    assert.stringEquals(bigIntToBytes32(BigInt.fromString('1')), ONE_BYTES32);
+    assert.stringEquals(
+      bigIntToBytes32(MAX_UINT256.div(BigInt.fromString('2'))),
+      HALF_UINT256_BYTES32
+    );
+    assert.stringEquals(bigIntToBytes32(MAX_UINT256), MAX_UINT256_BYTES32);
   });
 });