diff --git a/sycl/test-e2e/Graph/Explicit/host_task_single.cpp b/sycl/test-e2e/Graph/Explicit/host_task_single.cpp
index b256c4724b945..61e18ca54386d 100644
--- a/sycl/test-e2e/Graph/Explicit/host_task_single.cpp
+++ b/sycl/test-e2e/Graph/Explicit/host_task_single.cpp
@@ -3,7 +3,10 @@
 // Extra run to check for leaks in Level Zero using UR_L0_LEAKS_DEBUG
 // RUN: %if level_zero %{env SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=0 %{l0_leak_check} %{run} %t.out 2>&1 | FileCheck %s --implicit-check-not=LEAK %}
 // Extra run to check for immediate-command-list in Level Zero
-// RUN: %if level_zero %{env SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=1 %{l0_leak_check} %{run} %t.out 2>&1 | FileCheck %s --implicit-check-not=LEAK %}
+// Immediate command-list testing is disabled on Windows due to a
+// non-deterministic leak of the Level Zero context, and is intended
+// to be re-enabled once this can be investigated and fixed.
+// RUN: %if level_zero && linux %{env SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=1 %{l0_leak_check} %{run} %t.out 2>&1 | FileCheck %s --implicit-check-not=LEAK %}
 
 // REQUIRES: aspect-usm_host_allocations
 
diff --git a/sycl/test-e2e/Graph/RecordReplay/host_task_single.cpp b/sycl/test-e2e/Graph/RecordReplay/host_task_single.cpp
index 283807387d3df..44987c8f8b104 100644
--- a/sycl/test-e2e/Graph/RecordReplay/host_task_single.cpp
+++ b/sycl/test-e2e/Graph/RecordReplay/host_task_single.cpp
@@ -3,7 +3,10 @@
 // Extra run to check for leaks in Level Zero using UR_L0_LEAKS_DEBUG
 // RUN: %if level_zero %{env SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=0 %{l0_leak_check} %{run} %t.out 2>&1 | FileCheck %s --implicit-check-not=LEAK %}
 // Extra run to check for immediate-command-list in Level Zero
-// RUN: %if level_zero %{env SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=1 %{l0_leak_check} %{run} %t.out 2>&1 | FileCheck %s --implicit-check-not=LEAK %}
+// Immediate command-list testing is disabled on Windows due to a
+// non-deterministic leak of the Level Zero context, and is intended
+// to be re-enabled once this can be investigated and fixed.
+// RUN: %if level_zero && linux %{env SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=1 %{l0_leak_check} %{run} %t.out 2>&1 | FileCheck %s --implicit-check-not=LEAK %}
 
 // REQUIRES: aspect-usm_host_allocations