diff --git a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/A.sol b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/A.sol
index ad5f5e77cb..2df470ed39 100644
--- a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/A.sol
+++ b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/A.sol
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
 pragma solidity ^0.7.0;
 
 import "dependency/contracts/Dep1.sol";
diff --git a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/B.sol b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/B.sol
index 0289d130fc..092fd24877 100644
--- a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/B.sol
+++ b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/B.sol
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
 pragma solidity ^0.7.0;
 
 import "dependency/contracts/Dep1.sol";
diff --git a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/hardhat.config.js b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/hardhat.config.js
index 38f2a55388..a53bbe1b77 100644
--- a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/hardhat.config.js
+++ b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/hardhat.config.js
@@ -1,3 +1,7 @@
+// This project is compiled from scratch multiple times in the same test, which
+// produces a lot of logs. We override this task to omit those logs.
+subtask("compile:solidity:log:compilation-result", () => {});
+
 module.exports = {
   solidity: "0.7.3",
 };
diff --git a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep1.sol b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep1.sol
index c3cbfee01f..5d15b30180 100644
--- a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep1.sol
+++ b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep1.sol
@@ -1 +1,2 @@
+// SPDX-License-Identifier: UNLICENSED
 pragma solidity ^0.7.0;
diff --git a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep2.sol b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep2.sol
index c3cbfee01f..5d15b30180 100644
--- a/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep2.sol
+++ b/packages/hardhat-core/test/fixture-projects/consistent-build-info-names/node_modules/dependency/contracts/Dep2.sol
@@ -1 +1,2 @@
+// SPDX-License-Identifier: UNLICENSED
 pragma solidity ^0.7.0;
diff --git a/packages/hardhat-core/test/fixture-projects/project-with-scripts/contracts/a.sol b/packages/hardhat-core/test/fixture-projects/project-with-scripts/contracts/a.sol
index 19d44c5f96..1b8938dc93 100644
--- a/packages/hardhat-core/test/fixture-projects/project-with-scripts/contracts/a.sol
+++ b/packages/hardhat-core/test/fixture-projects/project-with-scripts/contracts/a.sol
@@ -1,2 +1,3 @@
+pragma solidity ^0.5.0;
 contract A {}