How to Get a Count of Unique Values and paste them on a different tab

I have a spreadsheet (same attached)

I want to be able to count the number of values appearing in Column G (Tests Sheet), however since there are duplicate occurrences I would only count the dup once.

I want to use the returning value on the (totals tab) column C8
Test-scripts-8-06._03132107.xlsx
seamus9909Asked:
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Rey Obrero (Capricorn1)Commented:
try the method stated here
ShumsExcel & VBA ExpertCommented:
Try this:
=SUM(IF(FREQUENCY(Tests!G:G,Tests!G:G)>0,1))

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Test-scripts-8-06._03132107.xlsx

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ShumsExcel & VBA ExpertCommented:
If you also want to list of Unique values, please find attached..
Test-scripts-8-06._03132107_v1.xlsx
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