diff --git a/spec/epp/contact_spec.rb b/spec/epp/contact_spec.rb
index 83de99719..7c3714fba 100644
--- a/spec/epp/contact_spec.rb
+++ b/spec/epp/contact_spec.rb
@@ -459,7 +459,7 @@ describe 'EPP Contact', epp: true do
             attrs: { type: 'birthday', cc: 'US' }
           },
           legalDocument: {
-            value: 'dGVzdCBmYWlsCg==',
+            value: Base64.encode64('S' * 4.kilobytes),
             attrs: { type: 'pdf' }
           }
         }
diff --git a/spec/epp/keyrelay_spec.rb b/spec/epp/keyrelay_spec.rb
index d42d96f4b..293c295bc 100644
--- a/spec/epp/keyrelay_spec.rb
+++ b/spec/epp/keyrelay_spec.rb
@@ -167,7 +167,7 @@ describe 'EPP Keyrelay', epp: true do
     }, {
       _anonymus: [
         legalDocument: {
-          value: 'dGVzdCBmYWlsCg==',
+          value: Base64.encode64('S' * 4.kilobytes),
           attrs: { type: 'pdf' }
         }
       ]
diff --git a/spec/support/epp.rb b/spec/support/epp.rb
index 6d57e7d9e..7088f1542 100644
--- a/spec/support/epp.rb
+++ b/spec/support/epp.rb
@@ -190,7 +190,7 @@ module Epp
     custom_defaults = {
       _anonymus: [
         legalDocument: {
-          value: 'dGVzdCBmYWlsCg==',
+          value: Base64.encode64('S' * 4.kilobytes),
           attrs: { type: 'pdf' }
         }
       ]
@@ -276,7 +276,7 @@ module Epp
     custom_params = {
       _anonymus: [
         legalDocument: {
-          value: 'dGVzdCBmYWlsCg==',
+          value: Base64.encode64('S' * 4.kilobytes),
           attrs: { type: 'pdf' }
         }
       ]