diff --git a/src/libraries/System.Private.CoreLib/src/System/TimeZoneInfo.cs b/src/libraries/System.Private.CoreLib/src/System/TimeZoneInfo.cs
index 583212906e68c1..0be2c6282eef96 100644
--- a/src/libraries/System.Private.CoreLib/src/System/TimeZoneInfo.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/TimeZoneInfo.cs
@@ -934,9 +934,9 @@ public bool HasSameRules(TimeZoneInfo other)
             AdjustmentRule[]? currentRules = _adjustmentRules;
             AdjustmentRule[]? otherRules = other._adjustmentRules;
 
-            if (currentRules is null || otherRules is null)
+            if (currentRules is null && otherRules is null)
             {
-                return currentRules == otherRules;
+                return true;
             }
 
             return currentRules.AsSpan().SequenceEqual(otherRules);
diff --git a/src/libraries/System.Runtime/tests/System/TimeZoneInfoTests.cs b/src/libraries/System.Runtime/tests/System/TimeZoneInfoTests.cs
index 386ca83b3771f1..3f8f93536626fd 100644
--- a/src/libraries/System.Runtime/tests/System/TimeZoneInfoTests.cs
+++ b/src/libraries/System.Runtime/tests/System/TimeZoneInfoTests.cs
@@ -2432,17 +2432,16 @@ public static void TimeZoneDisplayNames_Unix(TimeZoneInfo timeZone)
             }
         }
 
-        [Fact]
-        [PlatformSpecific(~TestPlatforms.Windows & ~TestPlatforms.Browser)]
+        private static bool SupportICUWithUtcAlias => PlatformDetection.IsIcuGlobalization && PlatformDetection.IsNotAppleMobile && PlatformDetection.IsNotBrowser;
+
+        [ConditionalFact(nameof(SupportICUWithUtcAlias))]
         public static void UtcAliases_MapToUtc()
         {
-            TimeZoneInfo.AdjustmentRule[] expectedAdjustmentRules = TimeZoneInfo.Utc.GetAdjustmentRules();
-
-            foreach (var alias in s_UtcAliases)
+            foreach (string alias in s_UtcAliases)
             {
                 TimeZoneInfo actualUtc = TimeZoneInfo.FindSystemTimeZoneById(alias);
-                Assert.Equal(TimeZoneInfo.Utc.BaseUtcOffset, actualUtc.BaseUtcOffset);
-                Assert.Equal(expectedAdjustmentRules, actualUtc.GetAdjustmentRules());
+                Assert.True(TimeZoneInfo.Utc.HasSameRules(actualUtc));
+                Assert.True(actualUtc.HasSameRules(TimeZoneInfo.Utc));
             }
         }