diff --git a/test/PositionDescriptor.t.sol b/test/PositionDescriptor.t.sol
index 495f280b..6c24a4af 100644
--- a/test/PositionDescriptor.t.sol
+++ b/test/PositionDescriptor.t.sol
@@ -125,6 +125,8 @@ contract PositionDescriptorTest is Test, PosmTestSetup, GasSnapshot {
         Token memory token = abi.decode(data, (Token));
 
         // quote is currency1, base is currency0
+        assertFalse(positionDescriptor.flipRatio(Currency.unwrap(key.currency0), Currency.unwrap(key.currency1)));
+
         string memory symbol0 = SafeAddressMetadata.addressSymbol(Currency.unwrap(currency0), nativeCurrencyLabel);
         string memory symbol1 = SafeAddressMetadata.addressSymbol(Currency.unwrap(currency1), nativeCurrencyLabel);
         string memory managerAddress = toHexString(address(manager));
@@ -230,6 +232,10 @@ contract PositionDescriptorTest is Test, PosmTestSetup, GasSnapshot {
         Token memory token = abi.decode(data, (Token));
 
         // quote is currency1, base is currency0
+        assertFalse(
+            positionDescriptor.flipRatio(Currency.unwrap(nativeKey.currency0), Currency.unwrap(nativeKey.currency1))
+        );
+
         string memory symbol0 =
             SafeAddressMetadata.addressSymbol(Currency.unwrap(nativeKey.currency0), nativeCurrencyLabel);
         string memory symbol1 =
diff --git a/test/libraries/SVG.t.sol b/test/libraries/SVG.t.sol
index c322483e..915557cb 100644
--- a/test/libraries/SVG.t.sol
+++ b/test/libraries/SVG.t.sol
@@ -47,4 +47,11 @@ contract DescriptorTest is Test {
         result = SVG.isRare(2, 0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB);
         assertFalse(result);
     }
+
+    function test_substring_succeeds() public pure {
+        string memory result = SVG.substring("0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", 0, 5);
+        assertEq(result, "0xC02");
+        result = SVG.substring("0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", 39, 42);
+        assertEq(result, "Cc2");
+    }
 }