diff --git a/test/orfs/mock-array/power.tcl b/test/orfs/mock-array/power.tcl
index 384e9922094..142b980ace5 100644
--- a/test/orfs/mock-array/power.tcl
+++ b/test/orfs/mock-array/power.tcl
@@ -21,8 +21,9 @@ log_cmd report_checks
 log_cmd report_power
 
 set fp [open $::env(RESULTS_DIR)/activity.tcl w]
-set pins [get_pins -hierarchical *]
-set clock_period [expr [get_property [get_clocks] period] * 1e-12]
+set pins [lsort -dictionary [get_pins -hierarchical *]]
+set periods [get_property [get_clocks] period]
+set clock_period [expr [lindex [lsort -real $periods] end] * 1e-12]
 foreach pin $pins {
   set activity [get_property $pin activity]
   set activity_origin [lindex $activity 2]
@@ -103,7 +104,7 @@ set total_power_user_activity [total_power]
 puts "Total power from VCD: $total_power_vcd"
 puts "Total power from user activity: $total_power_user_activity"
 
-if { $total_power_vcd == $total_power_user_activity } {
+if { abs($total_power_vcd - $total_power_user_activity) < 1e-9 } {
   puts "Error: setting user power activity had no effect, expected some loss in accuracy"
   exit 1
 }