diff --git a/src/libexpr-tests/main.cc b/src/libexpr-tests/main.cc
index d6b0d0ab9..88a9d6684 100644
--- a/src/libexpr-tests/main.cc
+++ b/src/libexpr-tests/main.cc
@@ -1,15 +1,19 @@
 #include <gtest/gtest.h>
 
 #include "nix/store/tests/test-main.hh"
+#include "nix/util/config-global.hh"
 
 using namespace nix;
 
 int main(int argc, char ** argv)
 {
     auto res = testMainForBuidingPre(argc, argv);
-    if (!res)
+    if (res)
         return res;
 
+    // For pipe operator tests in trivial.cc
+    experimentalFeatureSettings.set("experimental-features", "pipe-operators");
+
     ::testing::InitGoogleTest(&argc, argv);
     return RUN_ALL_TESTS();
 }