diff --git a/src/libraries/System.Security.Cryptography/tests/X509Certificates/PfxIterationCountTests.cs b/src/libraries/System.Security.Cryptography/tests/X509Certificates/PfxIterationCountTests.cs
index 3d3cc1295d3d9..1f65016841437 100644
--- a/src/libraries/System.Security.Cryptography/tests/X509Certificates/PfxIterationCountTests.cs
+++ b/src/libraries/System.Security.Cryptography/tests/X509Certificates/PfxIterationCountTests.cs
@@ -64,7 +64,7 @@ public void Import_IterationCountLimitExceeded_Throws(string name, string passwo
             Assert.Contains(FwlinkId, ce.Message);
         }
 
-        [ConditionalTheory]
+        [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.Is64BitProcess))]
         [MemberData(nameof(GetCertsWith_IterationCountExceedingDefaultLimit_MemberData))]
         public void ImportWithPasswordOrFileName_IterationCountLimitExceeded(string name, string password, bool usesPbes2, byte[] blob, long iterationCount, bool usesRC2)
         {