Hello,
If the test was created directly on the device, you will need to have SPM discover the test before it shows up in the "All Tests" search results list.
(These steps assume you are looking at the SPM folder in the Locater Tab)
Run the "All Test Hosts" search first.
Select the Nexus device that has the ICMP test.
Right-Click and select "Discover Tests"
Once the Test is discovered, you can run the "All Tests" search and see the test model in Spectrum.
Adam