diff --git a/core/src/main/java/org/apache/iceberg/rest/responses/OAuthTokenResponse.java b/core/src/main/java/org/apache/iceberg/rest/responses/OAuthTokenResponse.java
index 56c35f3cc6c6..270fe50e824e 100644
--- a/core/src/main/java/org/apache/iceberg/rest/responses/OAuthTokenResponse.java
+++ b/core/src/main/java/org/apache/iceberg/rest/responses/OAuthTokenResponse.java
@@ -108,7 +108,7 @@ public Builder setExpirationInSeconds(int durationInSeconds) {
     }
 
     public Builder addScope(String scope) {
-      Preconditions.checkArgument(OAuth2Util.isValidScopeToken(scope), "Invalid scope: %s");
+      Preconditions.checkArgument(OAuth2Util.isValidScopeToken(scope), "Invalid scope: %s", scope);
       this.scopes.add(scope);
       return this;
     }
diff --git a/core/src/test/java/org/apache/iceberg/rest/responses/TestOAuthTokenResponse.java b/core/src/test/java/org/apache/iceberg/rest/responses/TestOAuthTokenResponse.java
index aec052de9aa6..8961991cd345 100644
--- a/core/src/test/java/org/apache/iceberg/rest/responses/TestOAuthTokenResponse.java
+++ b/core/src/test/java/org/apache/iceberg/rest/responses/TestOAuthTokenResponse.java
@@ -130,4 +130,11 @@ public void testFailures() {
         .isInstanceOf(IllegalArgumentException.class)
         .hasMessageContaining("Cannot parse to a string value: token_type: 34");
   }
+
+  @Test
+  void invalidScopeReportsScopeValue() {
+    assertThatThrownBy(() -> OAuthTokenResponse.builder().addScope("bad scope"))
+        .isInstanceOf(IllegalArgumentException.class)
+        .hasMessage("Invalid scope: bad scope");
+  }
 }