diff --git a/decoder/src/main/java/dgca/verifier/app/decoder/model/Test.kt b/decoder/src/main/java/dgca/verifier/app/decoder/model/Test.kt
index 8c20bc6..ddffaf4 100644
--- a/decoder/src/main/java/dgca/verifier/app/decoder/model/Test.kt
+++ b/decoder/src/main/java/dgca/verifier/app/decoder/model/Test.kt
@@ -24,6 +24,9 @@ package dgca.verifier.app.decoder.model
 
 import com.fasterxml.jackson.annotation.JsonProperty
 import java.io.Serializable
+import java.time.OffsetDateTime
+import java.time.ZoneOffset
+import java.time.format.DateTimeFormatter
 
 data class Test(
 
@@ -60,4 +63,35 @@ data class Test(
     @JsonProperty("ci")
     val certificateIdentifier: String
 
-) : Serializable
\ No newline at end of file
+) : Serializable {
+
+    fun isTestValid(): Boolean {
+        return testResult == TestResult.NOT_DETECTED.value &&
+                parseToUtcTimestamp(dateTimeOfCollection).isBefore(OffsetDateTime.now())
+    }
+
+    fun getTestResultType(): TestResult {
+        return when (testResult) {
+            TestResult.DETECTED.value -> TestResult.DETECTED
+            TestResult.NOT_DETECTED.value -> TestResult.NOT_DETECTED
+            else -> TestResult.NOT_DETECTED
+        }
+    }
+
+    private fun parseToUtcTimestamp(value: String?): OffsetDateTime {
+        if (value.isNullOrEmpty()) {
+            return OffsetDateTime.MAX
+        }
+
+        return try {
+            DateTimeFormatter.ISO_OFFSET_DATE_TIME.parse(value, OffsetDateTime::from).withOffsetSameInstant(ZoneOffset.UTC)
+        } catch (ex: Exception) {
+            OffsetDateTime.MAX
+        }
+    }
+
+    enum class TestResult(val value: String) {
+        DETECTED("260373001"),
+        NOT_DETECTED("260415000")
+    }
+}
diff --git a/decoder/src/main/java/dgca/verifier/app/decoder/model/VerificationResult.kt b/decoder/src/main/java/dgca/verifier/app/decoder/model/VerificationResult.kt
index 5123e05..a8328ac 100644
--- a/decoder/src/main/java/dgca/verifier/app/decoder/model/VerificationResult.kt
+++ b/decoder/src/main/java/dgca/verifier/app/decoder/model/VerificationResult.kt
@@ -28,11 +28,14 @@ data class VerificationResult(
     var zlibDecoded: Boolean = false,
     var coseVerified: Boolean = false,
     var cborDecoded: Boolean = false,
-    var isSchemaValid: Boolean = false
+    var isSchemaValid: Boolean = false,
+    var testVerification: TestVerificationResult? = null
 ) {
 
-    fun isValid(): Boolean =
-        base45Decoded && zlibDecoded && coseVerified && cborDecoded && isSchemaValid
+    fun isValid(): Boolean {
+        val isTestValid = testVerification?.isDetected ?: true
+        return base45Decoded && zlibDecoded && coseVerified && cborDecoded && isSchemaValid && isTestValid
+    }
 
     override fun toString(): String {
         return "VerificationResult: \n" +
@@ -43,4 +46,8 @@ data class VerificationResult(
                 "cborDecoded: $cborDecoded \n" +
                 "isSchemaValid: $isSchemaValid"
     }
-}
\ No newline at end of file
+}
+
+data class TestVerificationResult(
+    val isDetected: Boolean
+)
\ No newline at end of file