diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 1a14ed1fb..e84e369f7 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,5 +1,5 @@
 # =============================================================================
-# Copyright (c) 2018-2023, NVIDIA CORPORATION.
+# Copyright (c) 2018-2024, NVIDIA CORPORATION.
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at
@@ -104,11 +104,6 @@ function(ConfigureTest TEST_NAME)
   ConfigureTestInternal("${PTDS_TEST_NAME}" ${_RMM_TEST_UNPARSED_ARGUMENTS})
   target_compile_definitions("${PTDS_TEST_NAME}" PUBLIC CUDA_API_PER_THREAD_DEFAULT_STREAM)
 
-  # Test with custom thrust namespace
-  string(REGEX REPLACE "_TEST$" "_NAMESPACE_TEST" NS_TEST_NAME "${TEST_NAME}")
-  ConfigureTestInternal("${NS_TEST_NAME}" ${_RMM_TEST_UNPARSED_ARGUMENTS})
-  target_compile_definitions("${NS_TEST_NAME}" PUBLIC THRUST_WRAPPED_NAMESPACE=rmm_thrust)
-
   foreach(name ${TEST_NAME} ${PTDS_TEST_NAME} ${NS_TEST_NAME})
     rapids_test_add(
       NAME ${name}