diff --git a/spec/ruby/core/process/fixtures/clocks.rb b/spec/ruby/core/process/fixtures/clocks.rb

index 7537cfaba8..55ee0f294f 100644

--- a/spec/ruby/core/process/fixtures/clocks.rb

+++ b/spec/ruby/core/process/fixtures/clocks.rb

@@ -11,6 +11,10 @@ def self.clock_constants

       clocks -= [:CLOCK_BOOTTIME_ALARM, :CLOCK_REALTIME_ALARM]

     end

+    clocks = clocks.reject { |clock, value|

+      [:CLOCK_BOOTTIME, :CLOCK_TAI].include?(clock)

+    }

+

     clocks.sort.map { |c|

       [c, Process.const_get(c)]

     }

-- 

2.21.0