diff --git a/app/src/main/java/org/communiquons/dccaggregator/Constants.kt b/app/src/main/java/org/communiquons/dccaggregator/Constants.kt
index 6bd7607..f0f5cd2 100644
--- a/app/src/main/java/org/communiquons/dccaggregator/Constants.kt
+++ b/app/src/main/java/org/communiquons/dccaggregator/Constants.kt
@@ -4,4 +4,10 @@ package org.communiquons.dccaggregator
 const val WALLET_URL = "https://bonjour.tousanticovid.gouv.fr/app/walletdcc#"
 
 // Name of the preferences file holding certificates list
-const val PREF_CERTS_LIST = "certs_list"
\ No newline at end of file
+const val PREF_CERTS_LIST = "certs_list"
+
+const val RESULT_TEST_NEGATIVE = "260415000"
+const val RESULT_TEST_POSITIVE = "260373001"
+
+const val TEST_PCR = "LP6464-4"
+const val TEST_ANTIGENIC = "LP217198-3"
\ No newline at end of file
diff --git a/app/src/main/java/org/communiquons/dccaggregator/activities/CertsManager.kt b/app/src/main/java/org/communiquons/dccaggregator/activities/CertsManager.kt
index f03130d..ee6ea99 100644
--- a/app/src/main/java/org/communiquons/dccaggregator/activities/CertsManager.kt
+++ b/app/src/main/java/org/communiquons/dccaggregator/activities/CertsManager.kt
@@ -93,6 +93,9 @@ class CertsManager : BaseActivity() {
     }
 
     private fun refreshList() {
+        certsList.clear()
+        certsList.addAll(certsManager.certsList)
 
+        listAdapter.notifyDataSetChanged()
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/communiquons/dccaggregator/helper/CertificatesList.kt b/app/src/main/java/org/communiquons/dccaggregator/helper/CertificatesList.kt
index 78d354a..c2b8976 100644
--- a/app/src/main/java/org/communiquons/dccaggregator/helper/CertificatesList.kt
+++ b/app/src/main/java/org/communiquons/dccaggregator/helper/CertificatesList.kt
@@ -33,6 +33,8 @@ class CertificatesList(context: Context) {
      * Add a certificate to the list
      */
     fun addCertificate(cert: Certificate) {
-        listString = listString.apply { add(cert.encoded) }
+        val list = HashSet(listString)
+        list.add(cert.encoded)
+        listString = list
     }
 }
diff --git a/app/src/main/java/org/communiquons/dccaggregator/models/Certificate.kt b/app/src/main/java/org/communiquons/dccaggregator/models/Certificate.kt
index 378d324..55ff6af 100644
--- a/app/src/main/java/org/communiquons/dccaggregator/models/Certificate.kt
+++ b/app/src/main/java/org/communiquons/dccaggregator/models/Certificate.kt
@@ -6,7 +6,11 @@ import dgca.verifier.app.decoder.DefaultCertificateDecoder
 import dgca.verifier.app.decoder.base45.Base45Decoder
 import dgca.verifier.app.decoder.model.GreenCertificate
 import dgca.verifier.app.decoder.model.RecoveryStatement
+import dgca.verifier.app.decoder.model.Vaccination
 import org.communiquons.dccaggregator.R
+import org.communiquons.dccaggregator.RESULT_TEST_POSITIVE
+import org.communiquons.dccaggregator.TEST_ANTIGENIC
+import org.communiquons.dccaggregator.TEST_PCR
 
 @OptIn(ExperimentalUnsignedTypes::class)
 class Certificate(val encoded: String) {
@@ -35,15 +39,44 @@ class Certificate(val encoded: String) {
 
     val dateOfBirth get() = decoded.dateOfBirth
 
+    val test get() = decoded.tests?.getOrNull(0)
+
+    val vaccination: Vaccination? get() = decoded.vaccinations?.getOrNull(0)
+
     val recovery: RecoveryStatement? get() = decoded.recoveryStatements?.getOrNull(0)
 
     fun descText(ctx: Context): String {
+        if (vaccination != null)
+            return ctx.resources.getString(
+                R.string.desc_vaccine_certificate,
+                vaccination!!.doseNumber,
+                vaccination!!.totalSeriesOfDoses,
+                vaccination!!.dateOfVaccination,
+                vaccination!!.vaccine
+            )
+
         if (recovery != null)
             return ctx.resources.getString(
                 R.string.desc_recovery_certificate,
                 recovery!!.dateOfFirstPositiveTest
             )
 
+        if (test != null)
+            return ctx.resources.getString(
+                R.string.desc_test_certificate,
+                ctx.resources.getString(
+                    if (test!!.testResult == RESULT_TEST_POSITIVE)
+                        R.string.positive
+                    else
+                        R.string.negative
+                ).uppercase(),
+                test!!.dateTimeOfCollection,
+                ctx.resources.getString(when(test!!.typeOfTest) {
+                    TEST_ANTIGENIC -> R.string.antigenic
+                    TEST_PCR -> R.string.pcr
+                    else -> R.string.unkown_test_type
+                })
+            )
 
         return ctx.resources.getString(R.string.desc_unknown_certificate)
     }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 64bd56b..b763e25 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -7,6 +7,15 @@
     <string name="invalid_certificate">The given certificate could not be decoded!</string>
     <string name="certificate_qr_code">Certificate QR Code</string>
 
+    <string name="positive">positive</string>
+    <string name="negative">negative</string>
+
+    <string name="pcr">PCR</string>
+    <string name="antigenic">Antigenic</string>
+    <string name="unkown_test_type">Unknown test type</string>
+
+    <string name="desc_test_certificate">Test certificate\nTested %1$s\nDate: %2$s\nTest type: %3$s</string>
+    <string name="desc_vaccine_certificate">Vaccine certificate\nDose %1$d / %2$d\nDate: %3$s\nType: %4$s</string>
     <string name="desc_recovery_certificate">Recovery certificate\nTested positive on %1$s</string>
     <string name="desc_unknown_certificate">Unknown certificate type</string>
 </resources>
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