COMPMID-1627: (nightly) ROIAlign failure

Change-Id: I062e7673f26d5267ed113eae7edd361d05d6de73
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/151968
Reviewed-by: Isabella Gottardi <isabella.gottardi@arm.com>
Tested-by: bsgcomp <bsgcomp@arm.com>
diff --git a/tests/validation/CL/ROIAlignLayer.cpp b/tests/validation/CL/ROIAlignLayer.cpp
index 8be16b4..acea6d4 100644
--- a/tests/validation/CL/ROIAlignLayer.cpp
+++ b/tests/validation/CL/ROIAlignLayer.cpp
@@ -91,7 +91,7 @@
                                                    framework::dataset::make("Batches", { 1, 4, 8 })))
 {
     // Validate output
-    validate(CLAccessor(_target), _reference, relative_tolerance_f32, 0.f, absolute_tolerance_f32);
+    validate(CLAccessor(_target), _reference, relative_tolerance_f32, .02f, absolute_tolerance_f32);
 }
 TEST_SUITE_END() // FP32