a cached test just refers to a test where something went wrong. usually resulting in your speed being reported as extremely high
:::.. Download Stats ..:::
Connection is:: 37280 Kbps about 37.3 Mbps (tested with 12160 kB)
Download Speed is:: 4551 kB/s
Tested From:: https://testmy.net/ (server2)
Test Time:: Mon Sep 19 12:32:15 UTC+0100 2005
Bottom Line:: 666X faster than 56K 1MB download in 0.23 sec
Diagnosis: Awesome! 20% + : 2112.46 % faster than the average for host (ntl.com)
Validation Link:: https://testmy.net/stats/id-1NLU5C0J3
notice it says Diagnosis: Awesome! 20% + : 2112.46 % faster than the average for host (ntl.com)
thats because thier was a problem during the test your never going to get 2112% faster then what you are supposed to get. in your case 2mb.