diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -64,10 +64,6 @@
     fCheckBlockIndex = true;
     SelectParams(chainName);
     noui_connect();
-
-    // Set config parameters to default.
-    GlobalConfig config;
-    config.SetMaxBlockSize(DEFAULT_MAX_BLOCK_SIZE);
 }
 
 BasicTestingSetup::~BasicTestingSetup() {