diff --git a/hooks/src/main/java/com/okta/hooks/sdk/Hooks.java b/hooks/src/main/java/com/okta/hooks/sdk/Hooks.java
index 9775803..28c8d8a 100644
--- a/hooks/src/main/java/com/okta/hooks/sdk/Hooks.java
+++ b/hooks/src/main/java/com/okta/hooks/sdk/Hooks.java
@@ -77,7 +77,7 @@ private static class DefaultBuilder implements Builder {
 
         @Override
         public Builder error(String message) {
-            this.error = getOrCreateError(false)
+            this.error = getOrCreateError(false, message)
                     .setErrorSummary(message);
             return this;
         }
@@ -90,7 +90,7 @@ public Builder errorCause(String message) {
 
         @Override
         public Builder errorCause(HookErrorCause cause) {
-            error = getOrCreateError(true);
+            error = getOrCreateError(true, cause.getErrorSummary());
             error.getErrorCauses().add(cause);
             return this;
         }
@@ -139,9 +139,9 @@ public String toString() {
             return SERIALIZER.serialize(build());
         }
 
-        private HookError getOrCreateError(boolean initCauses) {
+        private HookError getOrCreateError(boolean initCauses, String errorSummary) {
 
-            HookError hookError = error != null ? error : new HookError();
+            HookError hookError = error != null ? error : new HookError().setErrorSummary(errorSummary);
 
             if (initCauses && hookError.getErrorCauses() == null) {
                 hookError.setErrorCauses(new ArrayList<>());
diff --git a/hooks/src/test/groovy/com/okta/hooks/sdk/TokenHooksTest.groovy b/hooks/src/test/groovy/com/okta/hooks/sdk/TokenHooksTest.groovy
index e6e6d66..7ec0c63 100644
--- a/hooks/src/test/groovy/com/okta/hooks/sdk/TokenHooksTest.groovy
+++ b/hooks/src/test/groovy/com/okta/hooks/sdk/TokenHooksTest.groovy
@@ -38,7 +38,7 @@ class TokenHooksTest implements HooksSupport {
         def builder = Hooks.builder()
             .error("test-error")
 
-        def expectedToString = expected"""{"error": {"errorSummary": "test-error"}}"""
+        def expectedToString = expected"""{"error": { "errorSummary": "test-error"}}"""
         assertThat builder.toString(), is(expectedToString)
     }
 
diff --git a/hooks/src/test/groovy/com/okta/hooks/sdk/UserRegHooksTest.groovy b/hooks/src/test/groovy/com/okta/hooks/sdk/UserRegHooksTest.groovy
index 254daf8..fad87a5 100644
--- a/hooks/src/test/groovy/com/okta/hooks/sdk/UserRegHooksTest.groovy
+++ b/hooks/src/test/groovy/com/okta/hooks/sdk/UserRegHooksTest.groovy
@@ -32,7 +32,7 @@ class UserRegHooksTest implements HooksSupport {
         def builder = Hooks.builder()
             .errorCause("test-error")
 
-        def expectedToString = expected"""{"error": {"errorCauses": [{ "errorSummary": "test-error" }]}}"""
+        def expectedToString = expected"""{"error": { "errorSummary": "test-error", "errorCauses": [{ "errorSummary": "test-error" }]}}"""
         assertThat builder.toString(), is(expectedToString)
     }
 
@@ -43,7 +43,7 @@ class UserRegHooksTest implements HooksSupport {
             .errorCause("test-error")
             .debugContext(["foo": "bar", "one": "two"])
 
-        def expectedToString = expected"""{"error": {"errorCauses": [{ "errorSummary": "test-error" }]}, "debugContext": {"foo": "bar", "one": "two"}}"""
+        def expectedToString = expected"""{"error": {"errorSummary": "test-error", "errorCauses": [{ "errorSummary": "test-error" }]}, "debugContext": {"foo": "bar", "one": "two"}}"""
         assertThat builder.toString(), is(expectedToString)
     }
 
@@ -96,7 +96,7 @@ class UserRegHooksTest implements HooksSupport {
             .errorCause("test-error1")
             .errorCause("test-error2")
 
-        def expectedToString = expected"""{"error": {"errorCauses": [{ "errorSummary": "test-error1" },{ "errorSummary": "test-error2" }]}}"""
+        def expectedToString = expected"""{"error": {"errorSummary": "test-error1", "errorCauses": [{ "errorSummary": "test-error1" },{ "errorSummary": "test-error2" }]}}"""
         assertThat builder.toString(), is(expectedToString)
     }