diff --git a/src/ERC1155Common.sol b/src/ERC1155Common.sol
index 17a9f9a..8dc8cbb 100644
--- a/src/ERC1155Common.sol
+++ b/src/ERC1155Common.sol
@@ -90,8 +90,7 @@ contract ERC1155Common is
     onlyRole(MINTER_ROLE)
   {
     uint256 length = tos.length;
-    require(length == amounts.length, "ERC1155: invalid array lengths");
-    require(length == datas.length, "ERC1155: invalid array lengths");
+    require(length != 0 && length == amounts.length && length == datas.length, "ERC1155: invalid array lengths");
 
     for (uint256 i; i < length; ++i) {
       _mint(tos[i], id, amounts[i], datas[i]);
@@ -101,7 +100,7 @@ contract ERC1155Common is
   /**
    * @dev See {ERC1155-uri}.
    */
-  function uri(uint256 tokenId) public view override returns (string memory) {
+  function uri(uint256 tokenId) public view virtual override returns (string memory) {
     string memory uri_ = super.uri(tokenId);
     return string.concat(uri_, tokenId.toString());
   }
@@ -109,14 +108,14 @@ contract ERC1155Common is
   /**
    * @dev Collection name.
    */
-  function name() public view returns (string memory) {
+  function name() public view virtual returns (string memory) {
     return _name;
   }
 
   /**
    * @dev Collection symbol.
    */
-  function symbol() public view returns (string memory) {
+  function symbol() public view virtual returns (string memory) {
     return _symbol;
   }
 
diff --git a/src/mock/launchpad/SampleNFT1155Launchpad.sol b/src/mock/launchpad/SampleNFT1155Launchpad.sol
index b070646..67fb4c7 100644
--- a/src/mock/launchpad/SampleNFT1155Launchpad.sol
+++ b/src/mock/launchpad/SampleNFT1155Launchpad.sol
@@ -1,17 +1,13 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.19;
 
-import { ERC1155 } from "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
-import { AccessControl } from "@openzeppelin/contracts/access/AccessControl.sol";
 import { NFTLaunchpadCommon } from "../../launchpad/NFTLaunchpadCommon.sol";
+import { SampleERC1155, ERC1155Common } from "../SampleERC1155.sol";
 
-contract SampleNFT1155Launchpad is ERC1155, AccessControl, NFTLaunchpadCommon {
-  bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
-
-  constructor(address admin, address minter, string memory uri_) ERC1155(uri_) {
-    _setupRole(DEFAULT_ADMIN_ROLE, admin);
-    _setupRole(MINTER_ROLE, minter);
-  }
+contract SampleNFT1155Launchpad is SampleERC1155, NFTLaunchpadCommon {
+  constructor(address admin, string memory name, string memory symbol, string memory uri)
+    SampleERC1155(admin, name, symbol, uri)
+  { }
 
   /// @dev Mint NFTs for the launchpad.
   function mintLaunchpad(address to, uint256 quantity, bytes calldata /* extraData */ )
@@ -35,9 +31,9 @@ contract SampleNFT1155Launchpad is ERC1155, AccessControl, NFTLaunchpadCommon {
     public
     view
     virtual
-    override(ERC1155, AccessControl, NFTLaunchpadCommon)
+    override(ERC1155Common, NFTLaunchpadCommon)
     returns (bool)
   {
-    return super.supportsInterface(interfaceId);
+    return ERC1155Common.supportsInterface(interfaceId) || NFTLaunchpadCommon.supportsInterface(interfaceId);
   }
 }
diff --git a/src/mock/launchpad/SampleNFT721Launchpad.sol b/src/mock/launchpad/SampleNFT721Launchpad.sol
index 6317bee..79e77a1 100644
--- a/src/mock/launchpad/SampleNFT721Launchpad.sol
+++ b/src/mock/launchpad/SampleNFT721Launchpad.sol
@@ -31,6 +31,6 @@ contract SampleNFT721Launchpad is SampleERC721, NFTLaunchpadCommon {
     override(ERC721Common, NFTLaunchpadCommon)
     returns (bool)
   {
-    return super.supportsInterface(interfaceId);
+    return ERC721Common.supportsInterface(interfaceId) || NFTLaunchpadCommon.supportsInterface(interfaceId);
   }
 }
diff --git a/test/foundry/SampleNFT1155Launchpad.t.sol b/test/foundry/SampleNFT1155Launchpad.t.sol
new file mode 100644
index 0000000..4c7ddaf
--- /dev/null
+++ b/test/foundry/SampleNFT1155Launchpad.t.sol
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import "forge-std/Test.sol";
+import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";
+import { SampleNFT1155Launchpad, SampleERC1155 } from "../../src/mock/launchpad/SampleNFT1155Launchpad.sol";
+import { INFTLaunchpad } from "src/interfaces/launchpad/INFTLaunchpad.sol";
+import { IERC1155Common } from "src/interfaces/IERC1155Common.sol";
+
+contract SampleERC1155LaunchpadTest is Test {
+  using Strings for uint256;
+
+  address admin = makeAddr("admin");
+  string public constant NAME = "SampleERC721";
+  string public constant SYMBOL = "NFT";
+  string public constant BASE_URI = "http://example.com/";
+
+  SampleNFT1155Launchpad internal _t;
+
+  function setUp() public virtual {
+    _t = new SampleNFT1155Launchpad(admin, NAME, SYMBOL, BASE_URI);
+  }
+
+  function testSupportInterface() public {
+    assertEq(_token().supportsInterface(type(INFTLaunchpad).interfaceId), true);
+    assertEq(_token().supportsInterface(type(IERC1155Common).interfaceId), true);
+  }
+
+  function _token() internal view virtual returns (SampleNFT1155Launchpad) {
+    return _t;
+  }
+}
diff --git a/test/foundry/SampleNFT721Launchpad.t.sol b/test/foundry/SampleNFT721Launchpad.t.sol
new file mode 100644
index 0000000..1d5d0c0
--- /dev/null
+++ b/test/foundry/SampleNFT721Launchpad.t.sol
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import "forge-std/Test.sol";
+import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";
+import { SampleNFT721Launchpad } from "../../src/mock/launchpad/SampleNFT721Launchpad.sol";
+import { INFTLaunchpad } from "src/interfaces/launchpad/INFTLaunchpad.sol";
+import { IERC721Common } from "src/interfaces/IERC721Common.sol";
+
+contract SampleNFT721LaunchpadTest is Test {
+  using Strings for uint256;
+
+  string public constant NAME = "SampleERC721";
+  string public constant SYMBOL = "NFT";
+  string public constant BASE_URI = "http://example.com/";
+
+  SampleNFT721Launchpad internal _t;
+
+  function setUp() public virtual {
+    _t = new SampleNFT721Launchpad(NAME, SYMBOL, BASE_URI);
+  }
+
+  function testSupportInterface() public {
+    assertEq(_token().supportsInterface(type(INFTLaunchpad).interfaceId), true);
+    assertEq(_token().supportsInterface(type(IERC721Common).interfaceId), true);
+  }
+
+  function _token() internal view virtual returns (SampleNFT721Launchpad) {
+    return _t;
+  }
+}