diff --git a/code/src/utest/pcgen/gui3/dialog/AboutDialogTest.java b/code/src/utest/pcgen/gui3/dialog/AboutDialogTest.java
index 5f981962a5b..0ad6e396274 100644
--- a/code/src/utest/pcgen/gui3/dialog/AboutDialogTest.java
+++ b/code/src/utest/pcgen/gui3/dialog/AboutDialogTest.java
@@ -22,6 +22,7 @@
 import java.net.URL;
 import java.util.ResourceBundle;
 
+import org.apache.commons.lang3.SystemUtils;
 import pcgen.system.LanguageBundle;
 
 import javafx.fxml.FXMLLoader;
@@ -41,6 +42,16 @@ class AboutDialogTest
 	@Start
 	private void Start(Stage stage) throws IOException
 	{
+		/*
+	    TODO Remove once JavaFx is updated to version 13.
+	    This is a temporary fix for https://github.com/javafxports/openjdk-jfx/issues/66.
+	    https://github.com/PCGen/pcgen/pull/5973
+	     */
+	    if (SystemUtils.IS_OS_WINDOWS)
+	    {
+            System.load("C:\\Windows\\System32\\WindowsCodecs.dll");
+        }
+
 		FXMLLoader loader = new FXMLLoader();
 		URL resource = AboutDialogController.class.getResource("AboutDialog.fxml");
 		assert resource != null;
diff --git a/code/src/utest/pcgen/gui3/preloader/PCGenPreloaderTest.java b/code/src/utest/pcgen/gui3/preloader/PCGenPreloaderTest.java
index f2e773f82f8..5a188a2ec44 100644
--- a/code/src/utest/pcgen/gui3/preloader/PCGenPreloaderTest.java
+++ b/code/src/utest/pcgen/gui3/preloader/PCGenPreloaderTest.java
@@ -20,6 +20,7 @@
 
 import java.io.IOException;
 
+import org.apache.commons.lang3.SystemUtils;
 import pcgen.system.LanguageBundle;
 
 import javafx.fxml.FXMLLoader;
@@ -39,6 +40,16 @@ class PCGenPreloaderTest
 	@Start
 	private void Start(Stage stage) throws IOException
 	{
+	    /*
+	    TODO Remove once JavaFx is updated to version 13.
+	    This is a temporary fix for https://github.com/javafxports/openjdk-jfx/issues/66.
+	    https://github.com/PCGen/pcgen/pull/5973
+	     */
+		if (SystemUtils.IS_OS_WINDOWS)
+		{
+			System.load("C:\\Windows\\System32\\WindowsCodecs.dll");
+		}
+
 		FXMLLoader loader = new FXMLLoader();
 		loader.setLocation(PCGenPreloader.class.getResource("PCGenPreloader.fxml"));
 		loader.setResources(LanguageBundle.getBundle());