diff --git a/google-cloud-debugger/lib/google/cloud/debugger/breakpoint/variable.rb b/google-cloud-debugger/lib/google/cloud/debugger/breakpoint/variable.rb
index <HASH>..<HASH> 100644
--- a/google-cloud-debugger/lib/google/cloud/debugger/breakpoint/variable.rb
+++ b/google-cloud-debugger/lib/google/cloud/debugger/breakpoint/variable.rb
@@ -103,7 +103,7 @@ module Google
 
           ##
           # @private Error message when variable can't be converted.
-          FAIL_CONVERSION_MSG = "Error: Variable couldn't be evaluated."
+          FAIL_CONVERSION_MSG = "Error: Unable to inspect value"
 
           ##
           # @private Name of the variable, if any.
Update with dazuma's comment