diff --git a/src/libraries/System.IO.FileSystem/tests/File/Copy.cs b/src/libraries/System.IO.FileSystem/tests/File/Copy.cs
index 643d2a98cf22a2..8b1f1c2d4e78cd 100644
--- a/src/libraries/System.IO.FileSystem/tests/File/Copy.cs
+++ b/src/libraries/System.IO.FileSystem/tests/File/Copy.cs
@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using System.Security.Cryptography;
 using Xunit;
 
 namespace System.IO.Tests
@@ -350,6 +351,21 @@ public void WindowsAlternateDataStreamOverwrite(string defaultStream, string alt
             Assert.Throws<IOException>(() => Copy(testFileAlternateStream, testFile2, overwrite: true));
             Assert.Throws<IOException>(() => Copy(testFileAlternateStream, testFile2 + alternateStream, overwrite: true));
         }
+
+        [Fact]
+        public void DestinationFileIsTruncatedWhenItsLargerThanSourceFile()
+        {
+            string sourcePath = GetTestFilePath();
+            string destPath = GetTestFilePath();
+
+            byte[] content = RandomNumberGenerator.GetBytes(1000);
+            File.WriteAllBytes(sourcePath, content);
+            File.WriteAllBytes(destPath, RandomNumberGenerator.GetBytes(content.Length * 2));
+
+            Copy(sourcePath, destPath, overwrite: true);
+
+            Assert.Equal(content, File.ReadAllBytes(destPath));
+        }
     }
 
     /// <summary>