diff --git a/test/libsolidity/util/TestFileParser.h b/test/libsolidity/util/TestFileParser.h
index 71b50ad61..8517060ec 100644
--- a/test/libsolidity/util/TestFileParser.h
+++ b/test/libsolidity/util/TestFileParser.h
@@ -95,7 +95,7 @@ private:
 		/// Advances current position by 1 in the input stream.
 		void advance()
 		{
-			solAssert(m_char != m_source.end(), "Cannot advance beyond end.");
+			solAssert(!eof(), "Cannot advance beyond end.");
 			m_char = std::next(m_char, 1);
 		}