diff --git a/test/TemporaryDirectory.cpp b/test/TemporaryDirectory.cpp
index 60b9d0d1d..76d369bbe 100644
--- a/test/TemporaryDirectory.cpp
+++ b/test/TemporaryDirectory.cpp
@@ -18,9 +18,10 @@
 
 #include <test/TemporaryDirectory.h>
 
+#include <test/libsolidity/util/SoltestErrors.h>
+
 #include <boost/filesystem.hpp>
 
-#include <cassert>
 #include <regex>
 #include <iostream>
 
@@ -34,7 +35,7 @@ TemporaryDirectory::TemporaryDirectory(std::string const& _prefix):
 	m_path(fs::temp_directory_path() / fs::unique_path(_prefix + "-%%%%-%%%%-%%%%-%%%%"))
 {
 	// Prefix should just be a file name and not contain anything that would make us step out of /tmp.
-	assert(fs::path(_prefix) == fs::path(_prefix).stem());
+	soltestAssert(fs::path(_prefix) == fs::path(_prefix).stem(), "");
 
 	fs::create_directory(m_path);
 }
@@ -42,10 +43,10 @@ TemporaryDirectory::TemporaryDirectory(std::string const& _prefix):
 TemporaryDirectory::~TemporaryDirectory()
 {
 	// A few paranoid sanity checks just to be extra sure we're not deleting someone's homework.
-	assert(m_path.string().find(fs::temp_directory_path().string()) == 0);
-	assert(!fs::equivalent(m_path, fs::temp_directory_path()));
-	assert(!fs::equivalent(m_path, m_path.root_path()));
-	assert(!m_path.empty());
+	soltestAssert(m_path.string().find(fs::temp_directory_path().string()) == 0, "");
+	soltestAssert(!fs::equivalent(m_path, fs::temp_directory_path()), "");
+	soltestAssert(!fs::equivalent(m_path, m_path.root_path()), "");
+	soltestAssert(!m_path.empty(), "");
 
 	boost::system::error_code errorCode;
 	uintmax_t numRemoved = fs::remove_all(m_path, errorCode);
diff --git a/test/TemporaryDirectoryTest.cpp b/test/TemporaryDirectoryTest.cpp
index f1349320c..8c25794d2 100644
--- a/test/TemporaryDirectoryTest.cpp
+++ b/test/TemporaryDirectoryTest.cpp
@@ -18,6 +18,8 @@
 
 #include <test/TemporaryDirectory.h>
 
+#include <test/libsolidity/util/SoltestErrors.h>
+
 #include <boost/filesystem.hpp>
 #include <boost/test/unit_test.hpp>
 
@@ -26,8 +28,6 @@
 using namespace std;
 using namespace boost::test_tools;
 
-namespace fs = boost::filesystem;
-
 namespace solidity::test
 {
 
@@ -35,59 +35,59 @@ BOOST_AUTO_TEST_SUITE(TemporaryDirectoryTest)
 
 BOOST_AUTO_TEST_CASE(TemporaryDirectory_should_create_and_delete_a_unique_and_empty_directory)
 {
-	fs::path dirPath;
+	boost::filesystem::path dirPath;
 	{
 		TemporaryDirectory tempDir("temporary-directory-test");
 		dirPath = tempDir.path();
 
 		BOOST_TEST(dirPath.stem().string().find("temporary-directory-test") == 0);
-		BOOST_TEST(fs::equivalent(dirPath.parent_path(), fs::temp_directory_path()));
-		BOOST_TEST(fs::is_directory(dirPath));
-		BOOST_TEST(fs::is_empty(dirPath));
+		BOOST_TEST(boost::filesystem::equivalent(dirPath.parent_path(), boost::filesystem::temp_directory_path()));
+		BOOST_TEST(boost::filesystem::is_directory(dirPath));
+		BOOST_TEST(boost::filesystem::is_empty(dirPath));
 	}
-	BOOST_TEST(!fs::exists(dirPath));
+	BOOST_TEST(!boost::filesystem::exists(dirPath));
 }
 
 BOOST_AUTO_TEST_CASE(TemporaryDirectory_should_delete_its_directory_even_if_not_empty)
 {
-	fs::path dirPath;
+	boost::filesystem::path dirPath;
 	{
 		TemporaryDirectory tempDir("temporary-directory-test");
 		dirPath = tempDir.path();
 
-		BOOST_TEST(fs::is_directory(dirPath));
+		BOOST_TEST(boost::filesystem::is_directory(dirPath));
 
 		{
 			ofstream tmpFile((dirPath / "test-file.txt").string());
 			tmpFile << "Delete me!" << endl;
 		}
-		assert(fs::is_regular_file(dirPath / "test-file.txt"));
+		soltestAssert(boost::filesystem::is_regular_file(dirPath / "test-file.txt"), "");
 	}
-	BOOST_TEST(!fs::exists(dirPath / "test-file.txt"));
+	BOOST_TEST(!boost::filesystem::exists(dirPath / "test-file.txt"));
 }
 
 BOOST_AUTO_TEST_CASE(TemporaryWorkingDirectory_should_change_and_restore_working_directory)
 {
-	fs::path originalWorkingDirectory = fs::current_path();
+	boost::filesystem::path originalWorkingDirectory = boost::filesystem::current_path();
 
 	try
 	{
 		{
 			TemporaryDirectory tempDir("temporary-directory-test");
-			assert(fs::equivalent(fs::current_path(), originalWorkingDirectory));
-			assert(!fs::equivalent(tempDir.path(), originalWorkingDirectory));
+			soltestAssert(boost::filesystem::equivalent(boost::filesystem::current_path(), originalWorkingDirectory), "");
+			soltestAssert(!boost::filesystem::equivalent(tempDir.path(), originalWorkingDirectory), "");
 
 			TemporaryWorkingDirectory tempWorkDir(tempDir.path());
 
-			BOOST_TEST(fs::equivalent(fs::current_path(), tempDir.path()));
+			BOOST_TEST(boost::filesystem::equivalent(boost::filesystem::current_path(), tempDir.path()));
 		}
-		BOOST_TEST(fs::equivalent(fs::current_path(), originalWorkingDirectory));
+		BOOST_TEST(boost::filesystem::equivalent(boost::filesystem::current_path(), originalWorkingDirectory));
 
-		fs::current_path(originalWorkingDirectory);
+		boost::filesystem::current_path(originalWorkingDirectory);
 	}
 	catch (...)
 	{
-		fs::current_path(originalWorkingDirectory);
+		boost::filesystem::current_path(originalWorkingDirectory);
 	}
 }