diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index e1171082b..74a68e1f5 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -3464,7 +3464,6 @@ void DerivationGoal::runChild()
                 }
                 args.push_back(drv->builder);
             } else {
-                printError("warning: running in sandboxing test mode, sandbox disabled");
                 builder = drv->builder.c_str();
                 args.push_back(std::string(baseNameOf(drv->builder)));
             }