diff --git a/build.gradle.kts b/build.gradle.kts
index 7f15f5da..f5b0e9d2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -48,12 +48,14 @@ dependencies {
     testImplementation("org.junit.jupiter:junit-jupiter-params:$jupiterVersion")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:$jupiterVersion")
 
+    testImplementation("commons-io:commons-io:2.6")
     testImplementation("org.assertj:assertj-core:3.11.0")
     testImplementation("org.apache.commons:commons-lang3:3.8")
 
     // The following versions should match the ones of the add-ons.
     testImplementation("org.codehaus.groovy:groovy-all:2.4.14")
     testImplementation("org.jruby:jruby-complete:1.7.4")
+    testImplementation("org.mozilla:zest:0.14.0")
     testImplementation("org.python:jython-standalone:2.7.1")
 }
 
diff --git a/src/test/java/org/zaproxy/VerifyScripts.java b/src/test/java/org/zaproxy/VerifyScripts.java
index 29bf4348..f1671060 100644
--- a/src/test/java/org/zaproxy/VerifyScripts.java
+++ b/src/test/java/org/zaproxy/VerifyScripts.java
@@ -24,6 +24,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.Reader;
+import java.io.UncheckedIOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.FileVisitResult;
 import java.nio.file.Files;
@@ -42,6 +43,7 @@
 import javax.script.Compilable;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
+import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.SystemUtils;
 import org.apache.commons.lang3.mutable.MutableInt;
 import org.codehaus.groovy.jsr223.GroovyScriptEngineFactory;
@@ -51,6 +53,8 @@
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.mozilla.zest.core.v1.ZestJSON;
+import org.mozilla.zest.core.v1.ZestScript;
 import org.python.core.Options;
 import org.python.jsr223.PyScriptEngineFactory;
 
@@ -116,9 +120,16 @@ private static Stream<Arguments> scriptsRuby() {
     }
 
     private static Stream<Arguments> scriptsZest() {
-        // Just collect the files for now (Issue 114).
-        getFilesWithExtension(".zst");
-        return Stream.empty();
+        return testData(
+                ".zst",
+                reader -> {
+                    try {
+                        assertThat(ZestJSON.fromString(IOUtils.toString(reader)))
+                                .isInstanceOf(ZestScript.class);
+                    } catch (IOException e) {
+                        throw new UncheckedIOException(e);
+                    }
+                });
     }
 
     private static Stream<Arguments> testData(String extension, Compilable engine) {