diff --git a/lib/certificate_utils.robot b/lib/certificate_utils.robot
index 9930aac..961178c 100755
--- a/lib/certificate_utils.robot
+++ b/lib/certificate_utils.robot
@@ -9,6 +9,7 @@
 
 # Default wait sync time for certificate install and restart services.
 ${wait_time}    30
+${keybit_length}  2048
 
 *** Keywords ***
 
@@ -85,7 +86,7 @@
 
     Check If Openssl Tool Exist
 
-    ${openssl_cmd}=  Catenate  openssl req -x509 -sha256 -newkey rsa:2048
+    ${openssl_cmd}=  Catenate  openssl req -x509 -sha256 -newkey rsa:${keybit_length}
     ...  ${SPACE}-nodes -days ${time}
     ...  ${SPACE}-keyout ${cert_dir_name}/cert.pem -out ${cert_dir_name}/cert.pem
     ...  ${SPACE}-subj "/O=XYZ Corporation /CN=www.xyz.com"
diff --git a/redfish/dmtf_tools/test_redfishtool_certificate.robot b/redfish/dmtf_tools/test_redfishtool_certificate.robot
index 586a766..327d1f8 100644
--- a/redfish/dmtf_tools/test_redfishtool_certificate.robot
+++ b/redfish/dmtf_tools/test_redfishtool_certificate.robot
@@ -21,8 +21,8 @@
 
 ${root_cmd_args} =  SEPARATOR=
 ...  redfishtool raw -r ${OPENBMC_HOST}:${HTTPS_PORT} -u ${OPENBMC_USERNAME} -p ${OPENBMC_PASSWORD} -S Always
-
 ${invalid_value}  abc
+${keybit_length}  2048
 
 *** Test Cases ***
 
@@ -158,10 +158,10 @@
     [Template]  Generate CSR Via Redfishtool
 
     # csr_type  key_pair_algorithm  key_bit_length  key_curv_id  expected_status
-    Server      RSA                 ${2048}         ${EMPTY}     ok
-    Server      EC                  ${EMPTY}        prime256v1   ok
-    Server      EC                  ${EMPTY}        secp521r1    ok
-    Server      EC                  ${EMPTY}        secp384r1    ok
+    Server      RSA                 ${keybit_length}         ${EMPTY}     ok
+    Server      EC                  ${EMPTY}                 prime256v1   ok
+    Server      EC                  ${EMPTY}                 secp521r1    ok
+    Server      EC                  ${EMPTY}                 secp384r1    ok
 
 
 Verify CSR Generation For Client Certificate Via Redfishtool
@@ -170,10 +170,10 @@
     [Template]  Generate CSR Via Redfishtool
 
     # csr_type  key_pair_algorithm  key_bit_length  key_curv_id  expected_status
-    Client      RSA                 ${2048}         ${EMPTY}     ok
-    Client      EC                  ${EMPTY}        prime256v1   ok
-    Client      EC                  ${EMPTY}        secp521r1    ok
-    Client      EC                  ${EMPTY}        secp384r1    ok
+    Client      RSA                 ${keybit_length}         ${EMPTY}     ok
+    Client      EC                  ${EMPTY}                 prime256v1   ok
+    Client      EC                  ${EMPTY}                 secp521r1    ok
+    Client      EC                  ${EMPTY}                 secp384r1    ok
 
 
 Verify CSR Generation For Server Certificate With Invalid Value Via Redfishtool
@@ -182,8 +182,8 @@
     [Template]  Generate CSR Via Redfishtool
 
     # csr_type  key_pair_algorithm  key_bit_length    key_curv_id       expected_status
-    Server      ${invalid_value}    ${2048}           prime256v1        error
-    Server      RAS                 ${invalid_value}  ${EMPTY}          error
+    Server      ${invalid_value}    ${keybit_length}           prime256v1        error
+    Server      RAS                 ${invalid_value}           ${EMPTY}          error
 
 
 Verify CSR Generation For Client Certificate With Invalid Value Via Redfishtool
@@ -191,8 +191,8 @@
     [Tags]  Verify_CSR_Generation_For_Client_Certificate_With_Invalid_Value_Via_Redfishtool
     [Template]  Generate CSR Via Redfishtool
 
-    Client      ${invalid_value}    ${2048}           prime256v1        error
-    Client      RSA                 ${invalid_value}  ${EMPTY}          error
+    Client      ${invalid_value}    ${keybit_length}           prime256v1        error
+    Client      RSA                 ${invalid_value}           ${EMPTY}          error
 
 *** Keywords ***
 
diff --git a/redfish/managers/test_certificate.robot b/redfish/managers/test_certificate.robot
index f8f06ff..dd2c6d4 100644
--- a/redfish/managers/test_certificate.robot
+++ b/redfish/managers/test_certificate.robot
@@ -18,7 +18,7 @@
 
 ${invalid_value}  abc
 ${ROOT_CA_FILE_PATH}  /etc/ssl/certs/authority/*
-
+${keybit_length}  2048
 
 ** Test Cases **
 
@@ -141,10 +141,10 @@
     [Template]  Generate CSR Via Redfish
 
     # csr_type  key_pair_algorithm  key_bit_length  key_curv_id  expected_status
-    Server      RSA                 ${2048}         ${EMPTY}     ok
-    Server      EC                  ${EMPTY}        prime256v1   ok
-    Server      EC                  ${EMPTY}        secp521r1    ok
-    Server      EC                  ${EMPTY}        secp384r1    ok
+    Server      RSA                 ${keybit_length}         ${EMPTY}     ok
+    Server      EC                  ${EMPTY}                 prime256v1   ok
+    Server      EC                  ${EMPTY}                 secp521r1    ok
+    Server      EC                  ${EMPTY}                 secp384r1    ok
 
 
 Verify CSR Generation For Client Certificate
@@ -153,10 +153,10 @@
     [Template]  Generate CSR Via Redfish
 
     # csr_type  key_pair_algorithm  key_bit_length  key_curv_id  expected_status
-    Client      RSA                 ${2048}         ${EMPTY}     ok
-    Client      EC                  ${EMPTY}        prime256v1   ok
-    Client      EC                  ${EMPTY}        secp521r1    ok
-    Client      EC                  ${EMPTY}        secp384r1    ok
+    Client      RSA                 ${keybit_length}         ${EMPTY}     ok
+    Client      EC                  ${EMPTY}                 prime256v1   ok
+    Client      EC                  ${EMPTY}                 secp521r1    ok
+    Client      EC                  ${EMPTY}                 secp384r1    ok
 
 
 Verify CSR Generation For Server Certificate With Invalid Value
@@ -165,9 +165,9 @@
     [Template]  Generate CSR Via Redfish
 
     # csr_type  key_pair_algorithm  key_bit_length    key_curv_id       expected_status
-    Server      ${invalid_value}    ${2048}           prime256v1        error
-    Server      RAS                 ${invalid_value}  ${EMPTY}          error
-    Server      EC                  ${EMPTY}          ${invalid_value}  error
+    Server      ${invalid_value}    ${keybit_length}           prime256v1        error
+    Server      RAS                 ${invalid_value}           ${EMPTY}          error
+    Server      EC                  ${EMPTY}                   ${invalid_value}  error
 
 
 Verify CSR Generation For Client Certificate With Invalid Value
@@ -175,9 +175,9 @@
     [Tags]  Verify_CSR_Generation_For_Client_Certificate_With_Invalid_Value
     [Template]  Generate CSR Via Redfish
 
-    Client      ${invalid_value}    ${2048}           prime256v1        error
-    Client      RSA                 ${invalid_value}  ${EMPTY}          error
-    Client      EC                  ${EMPTY}          ${invalid_value}  error
+    Client      ${invalid_value}    ${keybit_length}           prime256v1        error
+    Client      RSA                 ${invalid_value}           ${EMPTY}          error
+    Client      EC                  ${EMPTY}                   ${invalid_value}  error
 
 
 Verify Expired Certificate Install