diff --git a/teavm-classlib/src/main/java/org/teavm/classlib/impl/unicode/UnicodeSupport.java b/teavm-classlib/src/main/java/org/teavm/classlib/impl/unicode/UnicodeSupport.java
index 9f33d0a5f..9a5ea3097 100644
--- a/teavm-classlib/src/main/java/org/teavm/classlib/impl/unicode/UnicodeSupport.java
+++ b/teavm-classlib/src/main/java/org/teavm/classlib/impl/unicode/UnicodeSupport.java
@@ -30,7 +30,7 @@ import org.teavm.common.IntegerArray;
  */
 public class UnicodeSupport {
     private static AtomicBoolean filled = new AtomicBoolean();
-    private static volatile CountDownLatch latch = new CountDownLatch(0);
+    private static volatile CountDownLatch latch = new CountDownLatch(1);
     private static int[] digitValues;
 
     private static void parseUnicodeData() {
@@ -130,6 +130,7 @@ public class UnicodeSupport {
     private static void ensureUnicodeData() {
         if (filled.compareAndSet(false, true)) {
             parseUnicodeData();
+            latch.countDown();
             latch = null;
         } else {
             CountDownLatch latchCopy = latch;
diff --git a/teavm-html4j/pom.xml b/teavm-html4j/pom.xml
index 3990ca7bc..0e6ff5096 100644
--- a/teavm-html4j/pom.xml
+++ b/teavm-html4j/pom.xml
@@ -85,7 +85,7 @@
             </goals>
             <phase>process-test-classes</phase>
             <configuration>
-              <minifying>false</minifying>
+              <minifying>true</minifying>
               <numThreads>1</numThreads>
               <scanDependencies>true</scanDependencies>
               <outputDir>${project.build.directory}/javascript-tck</outputDir>