diff --git a/src/providers/delimitedtext/qgsdelimitedtextfile.cpp b/src/providers/delimitedtext/qgsdelimitedtextfile.cpp
index 585de031b0cd..80a03304f39f 100644
--- a/src/providers/delimitedtext/qgsdelimitedtextfile.cpp
+++ b/src/providers/delimitedtext/qgsdelimitedtextfile.cpp
@@ -43,7 +43,7 @@ QgsDelimitedTextFile::QgsDelimitedTextFile( const QString &url )
 
   // For tests
   QString bufferSizeStr( getenv( "QGIS_DELIMITED_TEXT_FILE_BUFFER_SIZE" ) );
-  mMaxBufferSize = bufferSizeStr.isEmpty() ? 1024 * 1024 : bufferSizeStr.toInt();
+  mMaxBufferSize = bufferSizeStr.isEmpty() ? 10 * 1024 * 1024 : bufferSizeStr.toInt();
 }