diff --git a/sycl/doc/EnvironmentVariables.md b/sycl/doc/EnvironmentVariables.md
index f018aac9c261d..df624323bf453 100644
--- a/sycl/doc/EnvironmentVariables.md
+++ b/sycl/doc/EnvironmentVariables.md
@@ -196,7 +196,6 @@ variables in production code.</span>
 
 | Environment variable | Values | Description |
 | -------------------- | ------ | ----------- |
-| `SYCL_PREFER_UR` | Integer | If non-0 then run through Unified Runtime if desired backend is supported there. Default is 0.  |
 | `SYCL_UR_TRACE` | Integer | Described [below](#sycl_ur_trace-options)  | Enable specified level of tracing for UR. |
 | `SYCL_QUEUE_THREAD_POOL_SIZE` | Positive integer | Number of threads in thread pool of queue. |
 | `SYCL_DEVICELIB_NO_FALLBACK` | Any(\*) | Disable loading and linking of device library images |
diff --git a/sycl/test-e2e/AddressSanitizer/invalid-argument/bad-context.cpp b/sycl/test-e2e/AddressSanitizer/invalid-argument/bad-context.cpp
index d74ba81f297fe..1fedba1e83e20 100644
--- a/sycl/test-e2e/AddressSanitizer/invalid-argument/bad-context.cpp
+++ b/sycl/test-e2e/AddressSanitizer/invalid-argument/bad-context.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu && (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -DMALLOC_DEVICE -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 UR_LAYER_ASAN_OPTIONS="detect_kernel_arguments:1" %{run} not %t 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
+// RUN: env UR_LAYER_ASAN_OPTIONS="detect_kernel_arguments:1" %{run} not %t 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
 
 #include <sycl/detail/core.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/invalid-argument/host-pointer.cpp b/sycl/test-e2e/AddressSanitizer/invalid-argument/host-pointer.cpp
index a12a9570076bc..a5a5a27cb8633 100644
--- a/sycl/test-e2e/AddressSanitizer/invalid-argument/host-pointer.cpp
+++ b/sycl/test-e2e/AddressSanitizer/invalid-argument/host-pointer.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 UR_LAYER_ASAN_OPTIONS="detect_kernel_arguments:1" %{run} %if gpu %{ not %} %t 2>&1 | FileCheck --check-prefixes %if cpu %{ CHECK-CPU %} %if gpu %{ CHECK-GPU %} %s
+// RUN: env UR_LAYER_ASAN_OPTIONS="detect_kernel_arguments:1" %{run} %if gpu %{ not %} %t 2>&1 | FileCheck --check-prefixes %if cpu %{ CHECK-CPU %} %if gpu %{ CHECK-GPU %} %s
 
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
diff --git a/sycl/test-e2e/AddressSanitizer/invalid-argument/out-of-bounds.cpp b/sycl/test-e2e/AddressSanitizer/invalid-argument/out-of-bounds.cpp
index b6e2fa9ccbc0e..caa63e4bfc007 100644
--- a/sycl/test-e2e/AddressSanitizer/invalid-argument/out-of-bounds.cpp
+++ b/sycl/test-e2e/AddressSanitizer/invalid-argument/out-of-bounds.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 UR_LAYER_ASAN_OPTIONS="detect_kernel_arguments:1" %{run} not %t 2>&1 | FileCheck %s
+// RUN: env UR_LAYER_ASAN_OPTIONS="detect_kernel_arguments:1" %{run} not %t 2>&1 | FileCheck %s
 
 #include <sycl/detail/core.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/invalid-argument/released-pointer.cpp b/sycl/test-e2e/AddressSanitizer/invalid-argument/released-pointer.cpp
index f67a3b23019b0..37ef25eac53b8 100644
--- a/sycl/test-e2e/AddressSanitizer/invalid-argument/released-pointer.cpp
+++ b/sycl/test-e2e/AddressSanitizer/invalid-argument/released-pointer.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 UR_LAYER_ASAN_OPTIONS="quarantine_size_mb:1;detect_kernel_arguments:1" %{run} not %t 2>&1 | FileCheck %s
+// RUN: env UR_LAYER_ASAN_OPTIONS="quarantine_size_mb:1;detect_kernel_arguments:1" %{run} not %t 2>&1 | FileCheck %s
 
 #include <sycl/detail/core.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-int.cpp b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-int.cpp
index cd771a86cc2a1..2c65ace6f2ec8 100644
--- a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-int.cpp
+++ b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-int.cpp
@@ -1,10 +1,10 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O0 -g -o %t1.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t1.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O1 -g -o %t2.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t2.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O2 -g -o %t3.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t3.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t3.out 2>&1 | FileCheck %s
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp
index 9600442bd88fc..8ace4dff67789 100644
--- a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp
+++ b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-long.cpp
@@ -1,10 +1,10 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O0 -g -o %t1.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t1.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O1 -g -o %t2.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t2.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O2 -g -o %t3.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t3.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t3.out 2>&1 | FileCheck %s
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-short.cpp b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-short.cpp
index f65c5e9826dfc..ead194e3a9796 100644
--- a/sycl/test-e2e/AddressSanitizer/misaligned/misalign-short.cpp
+++ b/sycl/test-e2e/AddressSanitizer/misaligned/misalign-short.cpp
@@ -1,10 +1,10 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O0 -g -o %t1.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t1.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O1 -g -o %t2.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t2.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O2 -g -o %t3.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t3.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t3.out 2>&1 | FileCheck %s
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/multiple-reports/multiple_kernels.cpp b/sycl/test-e2e/AddressSanitizer/multiple-reports/multiple_kernels.cpp
index 087ecb8684458..76e2471939cb6 100644
--- a/sycl/test-e2e/AddressSanitizer/multiple-reports/multiple_kernels.cpp
+++ b/sycl/test-e2e/AddressSanitizer/multiple-reports/multiple_kernels.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -Xarch_device -fsanitize-recover=address -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 %{run} %t 2>&1 | FileCheck %s
+// RUN: %{run} %t 2>&1 | FileCheck %s
 
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
diff --git a/sycl/test-e2e/AddressSanitizer/multiple-reports/one_kernel.cpp b/sycl/test-e2e/AddressSanitizer/multiple-reports/one_kernel.cpp
index 0aeb6fd661808..94d2175de4b3d 100644
--- a/sycl/test-e2e/AddressSanitizer/multiple-reports/one_kernel.cpp
+++ b/sycl/test-e2e/AddressSanitizer/multiple-reports/one_kernel.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -Xarch_device -fsanitize-recover=address -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 %{run} %t 2>&1 | FileCheck %s
+// RUN: %{run} %t 2>&1 | FileCheck %s
 
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
diff --git a/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/large_group_size.cpp b/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/large_group_size.cpp
index 2627e1830fa77..801fa7689ce04 100644
--- a/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/large_group_size.cpp
+++ b/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/large_group_size.cpp
@@ -1,6 +1,6 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O2 -g -o %t
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t 2>&1 | FileCheck --check-prefixes CHECK %s
+// RUN: %{run} not %t 2>&1 | FileCheck --check-prefixes CHECK %s
 
 #include <sycl/detail/core.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/parallel_no_local_size.cpp b/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/parallel_no_local_size.cpp
index cd20a7ae381b4..0fa7a8e868886 100644
--- a/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/parallel_no_local_size.cpp
+++ b/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/parallel_no_local_size.cpp
@@ -1,14 +1,14 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -DMALLOC_DEVICE -O0 -g -o %t1.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
+// RUN: %{run} not %t1.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
 // RUN: %{build} %device_asan_flags -DMALLOC_DEVICE -O1 -g -o %t2.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
+// RUN: %{run} not %t2.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
 // RUN: %{build} %device_asan_flags -DMALLOC_DEVICE -O2 -g -o %t3.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t3.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
+// RUN: %{run} not %t3.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-DEVICE %s
 // RUN: %{build} %device_asan_flags -DMALLOC_HOST -O2 -g -o %t4.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t4.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-HOST %s
+// RUN: %{run} not %t4.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK-HOST %s
 // RUN: %{build} %device_asan_flags -DMALLOC_SHARED -O2 -g -o %t5.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t5.out &> %t.txt ; FileCheck --check-prefixes CHECK,CHECK-SHARED --input-file %t.txt %s
+// RUN: %{run} not %t5.out &> %t.txt ; FileCheck --check-prefixes CHECK,CHECK-SHARED --input-file %t.txt %s
 
 #include <sycl/detail/core.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/unaligned_shadow_memory.cpp b/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/unaligned_shadow_memory.cpp
index 5d6f666216c59..4c75cdbe8b62e 100644
--- a/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/unaligned_shadow_memory.cpp
+++ b/sycl/test-e2e/AddressSanitizer/out-of-bounds/USM/unaligned_shadow_memory.cpp
@@ -1,8 +1,8 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -DTEST1 -O0 -g -o %t1.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK1 %s
+// RUN: %{run} not %t1.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK1 %s
 // RUN: %{build} %device_asan_flags -DTEST2 -O0 -g -o %t2.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK2 %s
+// RUN: %{run} not %t2.out 2>&1 | FileCheck --check-prefixes CHECK,CHECK2 %s
 
 #include <sycl/detail/core.hpp>
 
diff --git a/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/multiple_private.cpp b/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/multiple_private.cpp
index b2ff0c500b13a..61b09b91ccd32 100644
--- a/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/multiple_private.cpp
+++ b/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/multiple_private.cpp
@@ -1,16 +1,16 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} -Wno-error=array-bounds %device_asan_flags -DVAR=1 -O2 -g -o %t1
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR1 %s
+// RUN: %{run} not %t1 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR1 %s
 // RUN: %{build} -Wno-error=array-bounds %device_asan_flags -DVAR=2 -O2 -g -o %t2
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR2 %s
+// RUN: %{run} not %t2 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR2 %s
 // RUN: %{build} %device_asan_flags -DVAR=3 -O2 -g -o %t3
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t3 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR3 %s
+// RUN: %{run} not %t3 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR3 %s
 // RUN: %{build} %device_asan_flags -DVAR=4 -O2 -g -o %t4
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t4 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR4 %s
+// RUN: %{run} not %t4 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR4 %s
 // RUN: %{build} %device_asan_flags -DVAR=5 -O2 -g -o %t5
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t5 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR5 %s
+// RUN: %{run} not %t5 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR5 %s
 // RUN: %{build} %device_asan_flags -DVAR=6 -O2 -g -o %t6
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t6 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR6 %s
+// RUN: %{run} not %t6 2>&1 | FileCheck --check-prefixes CHECK,CHECK-VAR6 %s
 
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>
diff --git a/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/single_private.cpp b/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/single_private.cpp
index 50480112367f3..71b994b73155f 100644
--- a/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/single_private.cpp
+++ b/sycl/test-e2e/AddressSanitizer/out-of-bounds/private/single_private.cpp
@@ -1,10 +1,10 @@
 // REQUIRES: linux, cpu || (gpu && level_zero)
 // RUN: %{build} %device_asan_flags -O0 -g -o %t1.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t1.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t1.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O1 -g -o %t2.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t2.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t2.out 2>&1 | FileCheck %s
 // RUN: %{build} %device_asan_flags -O2 -g -o %t3.out
-// RUN: env SYCL_PREFER_UR=1 %{run} not %t3.out 2>&1 | FileCheck %s
+// RUN: %{run} not %t3.out 2>&1 | FileCheck %s
 
 #include <sycl/detail/core.hpp>
 #include <sycl/usm.hpp>