diff --git a/src/Int128/USDPerQuantoInt128/Helpers.sol b/src/Int128/USDPerQuantoInt128/Helpers.sol
index 7f2416e..ca24b29 100644
--- a/src/Int128/USDPerQuantoInt128/Helpers.sol
+++ b/src/Int128/USDPerQuantoInt128/Helpers.sol
@@ -132,7 +132,7 @@ function mulDecimal(USDPerQuantoInt128 x, int128 y)
 }
 
 /// @notice Multiplies usd/quanto and quanto to get usd
-function mulDecimalToUSD(USDPerQuantoInt128 x, BaseInt128 y)
+function mulDecimalToUSD(USDPerQuantoInt128 x, QuantoInt128 y)
     pure
     returns (USDInt128 result)
 {
diff --git a/src/Int256/USDPerQuantoInt256/Helpers.sol b/src/Int256/USDPerQuantoInt256/Helpers.sol
index 8d5919b..55e6f71 100644
--- a/src/Int256/USDPerQuantoInt256/Helpers.sol
+++ b/src/Int256/USDPerQuantoInt256/Helpers.sol
@@ -129,7 +129,7 @@ function mulDecimal(USDPerQuantoInt256 x, int256 y)
 }
 
 /// @notice Multiplies usd/quanto and quanto to get usd
-function mulDecimalToUSD(USDPerQuantoInt256 x, BaseInt256 y)
+function mulDecimalToUSD(USDPerQuantoInt256 x, QuantoInt256 y)
     pure
     returns (USDInt256 result)
 {
diff --git a/src/Uint128/USDPerQuantoUint128/Helpers.sol b/src/Uint128/USDPerQuantoUint128/Helpers.sol
index e8cbf82..26dbfc3 100644
--- a/src/Uint128/USDPerQuantoUint128/Helpers.sol
+++ b/src/Uint128/USDPerQuantoUint128/Helpers.sol
@@ -141,7 +141,7 @@ function mulDecimal(USDPerQuantoUint128 x, uint128 y)
 }
 
 /// @notice Multiplies usd/quanto and quanto to get usd
-function mulDecimalToUSD(USDPerQuantoUint128 x, BaseUint128 y)
+function mulDecimalToUSD(USDPerQuantoUint128 x, QuantoUint128 y)
     pure
     returns (USDUint128 result)
 {
diff --git a/src/Uint256/USDPerQuantoUint256/Helpers.sol b/src/Uint256/USDPerQuantoUint256/Helpers.sol
index 5a03bf2..163a6ea 100644
--- a/src/Uint256/USDPerQuantoUint256/Helpers.sol
+++ b/src/Uint256/USDPerQuantoUint256/Helpers.sol
@@ -138,7 +138,7 @@ function mulDecimal(USDPerQuantoUint256 x, uint256 y)
 }
 
 /// @notice Multiplies usd/quanto and quanto to get usd
-function mulDecimalToUSD(USDPerQuantoUint256 x, BaseUint256 y)
+function mulDecimalToUSD(USDPerQuantoUint256 x, QuantoUint256 y)
     pure
     returns (USDUint256 result)
 {
diff --git a/test/Int128/USDPerQuantoInt128.t.sol b/test/Int128/USDPerQuantoInt128.t.sol
index d13aa9b..c97dba6 100644
--- a/test/Int128/USDPerQuantoInt128.t.sol
+++ b/test/Int128/USDPerQuantoInt128.t.sol
@@ -4,9 +4,8 @@ pragma solidity >=0.8.19;
 import {Test, console} from "forge-std/Test.sol";
 import {
     BaseQuantoPerUSDInt128,
-    BaseInt128,
     QuantoInt128,
-    USDPerBaseInt128,
+    BaseInt128,
     USDPerQuantoInt128,
     USDPerQuantoInt256,
     USDPerQuantoUint128,
@@ -310,7 +309,7 @@ contract USDPerQuantoInt128Test is Test {
 
     function testUSDPerQuantoInt128MulDecimalToUSD() public {
         USDPerQuantoInt128 x = USDPerQuantoInt128.wrap(100 ether);
-        BaseInt128 y = BaseInt128.wrap(200 ether);
+        QuantoInt128 y = QuantoInt128.wrap(200 ether);
         USDInt128 result = x.mulDecimalToUSD(y);
         assertEq(result.unwrap(), 20_000 ether);
     }
@@ -332,10 +331,10 @@ contract USDPerQuantoInt128Test is Test {
                 && (z / y != (x / 1 ether) || z / x != (y / 1 ether))
         ) {
             vm.expectRevert();
-            USDPerQuantoInt128.wrap(x).mulDecimalToUSD(BaseInt128.wrap(y));
+            USDPerQuantoInt128.wrap(x).mulDecimalToUSD(QuantoInt128.wrap(y));
         } else {
             USDInt128 result =
-                USDPerQuantoInt128.wrap(x).mulDecimalToUSD(BaseInt128.wrap(y));
+                USDPerQuantoInt128.wrap(x).mulDecimalToUSD(QuantoInt128.wrap(y));
             assertEq(result.unwrap(), z);
         }
     }
diff --git a/test/Int256/USDPerQuantoInt256.t.sol b/test/Int256/USDPerQuantoInt256.t.sol
index 5927106..8275df0 100644
--- a/test/Int256/USDPerQuantoInt256.t.sol
+++ b/test/Int256/USDPerQuantoInt256.t.sol
@@ -310,7 +310,7 @@ contract USDPerQuantoInt256Test is Test {
 
     function testUSDPerQuantoInt256MulDecimalToUSD() public {
         USDPerQuantoInt256 x = USDPerQuantoInt256.wrap(100 ether);
-        BaseInt256 y = BaseInt256.wrap(200 ether);
+        QuantoInt256 y = QuantoInt256.wrap(200 ether);
         USDInt256 result = x.mulDecimalToUSD(y);
         assertEq(result.unwrap(), 20_000 ether);
     }
@@ -332,10 +332,10 @@ contract USDPerQuantoInt256Test is Test {
                 && (z / y != (x / 1 ether) || z / x != (y / 1 ether))
         ) {
             vm.expectRevert();
-            USDPerQuantoInt256.wrap(x).mulDecimalToUSD(BaseInt256.wrap(y));
+            USDPerQuantoInt256.wrap(x).mulDecimalToUSD(QuantoInt256.wrap(y));
         } else {
             USDInt256 result =
-                USDPerQuantoInt256.wrap(x).mulDecimalToUSD(BaseInt256.wrap(y));
+                USDPerQuantoInt256.wrap(x).mulDecimalToUSD(QuantoInt256.wrap(y));
             assertEq(result.unwrap(), z);
         }
     }
diff --git a/test/Uint128/USDPerQuantoUint128.t.sol b/test/Uint128/USDPerQuantoUint128.t.sol
index fc3c095..95ffa09 100644
--- a/test/Uint128/USDPerQuantoUint128.t.sol
+++ b/test/Uint128/USDPerQuantoUint128.t.sol
@@ -307,7 +307,7 @@ contract USDPerQuantoUint128Test is Test {
 
     function testUSDPerQuantoUint128MulDecimalToUSD() public {
         USDPerQuantoUint128 x = USDPerQuantoUint128.wrap(100 ether);
-        BaseUint128 y = BaseUint128.wrap(200 ether);
+        QuantoUint128 y = QuantoUint128.wrap(200 ether);
         USDUint128 result = x.mulDecimalToUSD(y);
         assertEq(result.unwrap(), 20_000 ether);
     }
@@ -329,10 +329,10 @@ contract USDPerQuantoUint128Test is Test {
                 && (z / y != (x / 1 ether) || z / x != (y / 1 ether))
         ) {
             vm.expectRevert();
-            USDPerQuantoUint128.wrap(x).mulDecimalToUSD(BaseUint128.wrap(y));
+            USDPerQuantoUint128.wrap(x).mulDecimalToUSD(QuantoUint128.wrap(y));
         } else {
             USDUint128 result =
-                USDPerQuantoUint128.wrap(x).mulDecimalToUSD(BaseUint128.wrap(y));
+                USDPerQuantoUint128.wrap(x).mulDecimalToUSD(QuantoUint128.wrap(y));
             assertEq(result.unwrap(), z);
         }
     }
diff --git a/test/Uint256/USDPerQuantoUint256.t.sol b/test/Uint256/USDPerQuantoUint256.t.sol
index 58b519c..781ddc5 100644
--- a/test/Uint256/USDPerQuantoUint256.t.sol
+++ b/test/Uint256/USDPerQuantoUint256.t.sol
@@ -307,7 +307,7 @@ contract USDPerQuantoUint256Test is Test {
 
     function testUSDPerQuantoUint256MulDecimalToUSD() public {
         USDPerQuantoUint256 x = USDPerQuantoUint256.wrap(100 ether);
-        BaseUint256 y = BaseUint256.wrap(200 ether);
+        QuantoUint256 y = QuantoUint256.wrap(200 ether);
         USDUint256 result = x.mulDecimalToUSD(y);
         assertEq(result.unwrap(), 20_000 ether);
     }
@@ -329,10 +329,10 @@ contract USDPerQuantoUint256Test is Test {
                 && (z / y != (x / 1 ether) || z / x != (y / 1 ether))
         ) {
             vm.expectRevert();
-            USDPerQuantoUint256.wrap(x).mulDecimalToUSD(BaseUint256.wrap(y));
+            USDPerQuantoUint256.wrap(x).mulDecimalToUSD(QuantoUint256.wrap(y));
         } else {
             USDUint256 result =
-                USDPerQuantoUint256.wrap(x).mulDecimalToUSD(BaseUint256.wrap(y));
+                USDPerQuantoUint256.wrap(x).mulDecimalToUSD(QuantoUint256.wrap(y));
             assertEq(result.unwrap(), z);
         }
     }