diff --git a/modules/transports/core/nhttp/src/test/java/org/apache/synapse/transport/certificatevalidation/TestConstants.java b/modules/transports/core/nhttp/src/test/java/org/apache/synapse/transport/certificatevalidation/TestConstants.java
index 834a9d4c4c..a6e52f5749 100644
--- a/modules/transports/core/nhttp/src/test/java/org/apache/synapse/transport/certificatevalidation/TestConstants.java
+++ b/modules/transports/core/nhttp/src/test/java/org/apache/synapse/transport/certificatevalidation/TestConstants.java
@@ -27,21 +27,21 @@ public interface TestConstants {
 
     /**
      * The certificates in the resources folder will contain the certificates in the certificate chain from
-     * https://www.github.com
+     * https://www.digicert.com
      * These certificates are chosen because the certificate issuers support both CRL and OCSP. Read the certificates for
      * more details.
      *
      * CAUTION: Replace the certificates if they expire or are marked as revoked by their issuers. At the moment they are
      * valid. The expiry dates of the certificates are as follows:
      *
-     * github.com                    : 3/15/2024
-     * DigiCertHighAssuranceEVCA-1   : 4/14/2031
-     * DigiCertHighAssuranceEVRootCA : 11/10/2031
+     * digicert.com                  : 31/07/2024
+     * DigiCertHighAssuranceEVCA-1   : 02/07/2030
+     * DigiCertHighAssuranceEVRootCA : 15/01/2038
      */
     final static String REAL_PEER_CERT = "/org/apache/synapse/transport/certificatevalidation" +
-            "/certificates/github/github.com";
+            "/certificates/digicert/digicert.com";
     final static String INTERMEDIATE_CERT = "/org/apache/synapse/transport/certificatevalidation" +
-            "/certificates/github/DigiCertHighAssuranceEVCA-1";
+            "/certificates/digicert/DigiCertHighAssuranceEVCA-1";
     final static String ROOT_CERT = "/org/apache/synapse/transport/certificatevalidation" +
-            "/certificates/github/DigiCertHighAssuranceEVRootCA";
+            "/certificates/digicert/DigiCertHighAssuranceEVRootCA";
 }
diff --git a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/DigiCertHighAssuranceEVCA-1 b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/DigiCertHighAssuranceEVCA-1
new file mode 100644
index 0000000000..59bea9c019
--- /dev/null
+++ b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/DigiCertHighAssuranceEVCA-1
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
+MIIFPDCCBCSgAwIBAgIQAWePH++IIlXYsKcOa3uyIDANBgkqhkiG9w0BAQsFADBh
+MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
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+-----END CERTIFICATE-----
\ No newline at end of file
diff --git a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/DigiCertHighAssuranceEVRootCA b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/DigiCertHighAssuranceEVRootCA
new file mode 100644
index 0000000000..072601b81c
--- /dev/null
+++ b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/DigiCertHighAssuranceEVRootCA
@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
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+MrY=
+-----END CERTIFICATE-----
\ No newline at end of file
diff --git a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/digicert.com b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/digicert.com
new file mode 100644
index 0000000000..0cf8ada0b0
--- /dev/null
+++ b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/digicert/digicert.com
@@ -0,0 +1,43 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
\ No newline at end of file
diff --git a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/DigiCertHighAssuranceEVCA-1 b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/DigiCertHighAssuranceEVCA-1
deleted file mode 100644
index dc86357b57..0000000000
--- a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/DigiCertHighAssuranceEVCA-1
+++ /dev/null
@@ -1,24 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIEFzCCAv+gAwIBAgIQB/LzXIeod6967+lHmTUlvTANBgkqhkiG9w0BAQwFADBh
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------END CERTIFICATE-----
\ No newline at end of file
diff --git a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/DigiCertHighAssuranceEVRootCA b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/DigiCertHighAssuranceEVRootCA
deleted file mode 100644
index 57ba02c6d3..0000000000
--- a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/DigiCertHighAssuranceEVRootCA
+++ /dev/null
@@ -1,22 +0,0 @@
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
\ No newline at end of file
diff --git a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/github.com b/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/github.com
deleted file mode 100644
index 0d1d1dfd05..0000000000
--- a/modules/transports/core/nhttp/src/test/resources/org/apache/synapse/transport/certificatevalidation/certificates/github/github.com
+++ /dev/null
@@ -1,31 +0,0 @@
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
\ No newline at end of file