diff --git a/src/libraries/System.Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/Data/Factory.cs b/src/libraries/System.Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/Data/Factory.cs
index c2610eb092ced3..f1d96fc1c94097 100644
--- a/src/libraries/System.Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/Data/Factory.cs
+++ b/src/libraries/System.Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/Data/Factory.cs
@@ -28,7 +28,7 @@ private static Stream GetIdnaTestTxt()
             string fileName = null;
             if (PlatformDetection.ICUVersion >= new Version(76, 0))
                 fileName = "IdnaTest_16.txt";
-            else if (PlatformDetection.ICUVersion >= new Version(74, 0))
+            else if (PlatformDetection.ICUVersion >= new Version(72, 0))
                 fileName = "IdnaTest_15_1.txt";
             else if (PlatformDetection.ICUVersion >= new Version(66, 0) || PlatformDetection.IsHybridGlobalizationOnApplePlatform)
                 fileName = "IdnaTest_13.txt";
@@ -67,7 +67,7 @@ private static IConformanceIdnaTest GetConformanceIdnaTest(string line, int line
         {
             if (PlatformDetection.ICUVersion >= new Version(76, 0))
                 return new Unicode_16_0_IdnaTest(line, lineCount);
-            else if (PlatformDetection.ICUVersion >= new Version(74, 0))
+            else if (PlatformDetection.ICUVersion >= new Version(72, 0))
                 return new Unicode_15_1_IdnaTest(line, lineCount);
             else if (PlatformDetection.ICUVersion >= new Version(66, 0) || PlatformDetection.IsHybridGlobalizationOnApplePlatform)
                 return new Unicode_13_0_IdnaTest(line, lineCount);