diff --git a/src/Magick.NET.Core/Enums/MagickFormat.cs b/src/Magick.NET.Core/Enums/MagickFormat.cs
index 8f3eedc6de..be02ebb774 100644
--- a/src/Magick.NET.Core/Enums/MagickFormat.cs
+++ b/src/Magick.NET.Core/Enums/MagickFormat.cs
@@ -1128,6 +1128,11 @@ public enum MagickFormat
         /// </summary>
         Stegano,
 
+        /// <summary>
+        /// String to image and back.
+        /// </summary>
+        StrImg,
+
         /// <summary>
         /// SUN Rasterfile.
         /// </summary>
diff --git a/tests/Magick.NET.Tests/MagickNETTests/TheSupportedFormatsProperty.cs b/tests/Magick.NET.Tests/MagickNETTests/TheSupportedFormatsProperty.cs
index d392a0ad1f..dba35bb8ba 100644
--- a/tests/Magick.NET.Tests/MagickNETTests/TheSupportedFormatsProperty.cs
+++ b/tests/Magick.NET.Tests/MagickNETTests/TheSupportedFormatsProperty.cs
@@ -28,11 +28,11 @@ public void ShouldContainTheCorrectNumberOfFormats()
                 var formatsCount = MagickNET.SupportedFormats.Count();
 
                 if (OperatingSystem.IsWindows)
-                    Assert.Equal(264, formatsCount);
+                    Assert.Equal(265, formatsCount);
                 else if (OperatingSystem.IsLinux)
-                    Assert.Equal(261, formatsCount);
+                    Assert.Equal(262, formatsCount);
                 else
-                    Assert.Equal(260, formatsCount);
+                    Assert.Equal(261, formatsCount);
             }
         }
     }