QB Issue Resolution:

It usually takes a day.  If you don’t see them, contact whoever was doing the test for you.  Perhaps you entered the wrong bank information?

Resolution for Issue 'why am I not seeing the test transactions in my checking account?' available: Yes (Solved).
Source: Intuit Community forum.

why am I not seeing the test transactions in my checking account?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Bank information
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Error Recovery for Bank information [Canada]
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Additional Support Options: