diff --git a/src/libraries/System.Runtime/tests/System/ArrayTests.cs b/src/libraries/System.Runtime/tests/System/ArrayTests.cs
index 54bf303d2e2664..7f97f95f4507c7 100644
--- a/src/libraries/System.Runtime/tests/System/ArrayTests.cs
+++ b/src/libraries/System.Runtime/tests/System/ArrayTests.cs
@@ -3241,7 +3241,7 @@ public static void Reverse_MultidimensionalArray_ThrowsRankException()
             Assert.Throws<RankException>(() => Array.Reverse((Array)new int[10, 10], 0, 0));
         }
 
-        [Theory]
+        [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.IsNonZeroLowerBoundArraySupported))]
         [InlineData(0)]
         [InlineData(-1)]
         public static void Reverse_IndexLessThanLowerBound_ThrowsArgumentOutOfRangeException(int lowerBound)
@@ -3249,7 +3249,7 @@ public static void Reverse_IndexLessThanLowerBound_ThrowsArgumentOutOfRangeExcep
             AssertExtensions.Throws<ArgumentOutOfRangeException>("index", () => Array.Reverse(NonZeroLowerBoundArray(new int[0], lowerBound), lowerBound - 1, 0));
         }
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNonZeroLowerBoundArraySupported))]
         public static void Reverse_IndexLessThanPositiveLowerBound_ThrowsArgumentOutOfRangeException()
         {
             AssertExtensions.Throws<ArgumentOutOfRangeException>("index", "length", () => Array.Reverse(NonZeroLowerBoundArray(new int[0], 1), 0, 0));
@@ -4312,7 +4312,7 @@ public static void Reverse_Generic_InvalidOffsetPlusLength_ThrowsArgumentExcepti
             AssertExtensions.Throws<ArgumentException>(null, () => Array.Reverse(new string[arrayLength], index, length));
         }
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNonZeroLowerBoundArraySupported))]
         public static void Reverse_NonSZArrayWithMinValueLowerBound()
         {
             Array array = NonZeroLowerBoundArray(new int[] { 1, 2, 3 }, int.MinValue);
diff --git a/src/libraries/System.Runtime/tests/System/Runtime/CompilerServices/RuntimeHelpersTests.cs b/src/libraries/System.Runtime/tests/System/Runtime/CompilerServices/RuntimeHelpersTests.cs
index 33327d00fed473..d9b579c56476ad 100644
--- a/src/libraries/System.Runtime/tests/System/Runtime/CompilerServices/RuntimeHelpersTests.cs
+++ b/src/libraries/System.Runtime/tests/System/Runtime/CompilerServices/RuntimeHelpersTests.cs
@@ -198,7 +198,12 @@ public static IEnumerable<object[]> GetUninitializedObject_NegativeTestCases()
             yield return new[] { typeof(string), typeof(ArgumentException) }; // variable-length type
             yield return new[] { typeof(int[]), typeof(ArgumentException) }; // variable-length type
             yield return new[] { typeof(int[,]), typeof(ArgumentException) }; // variable-length type
-            yield return new[] { Array.CreateInstance(typeof(int), new[] { 1 }, new[] { 1 }).GetType(), typeof(ArgumentException) }; // variable-length type (non-szarray)
+
+            if (PlatformDetection.IsNonZeroLowerBoundArraySupported)
+            {
+                yield return new[] { Array.CreateInstance(typeof(int), new[] { 1 }, new[] { 1 }).GetType(), typeof(ArgumentException) }; // variable-length type (non-szarray)
+            }
+
             yield return new[] { typeof(Array), typeof(MemberAccessException) }; // abstract type
             yield return new[] { typeof(Enum), typeof(MemberAccessException) }; // abstract type