tcell test cannot run with TERM=""

[yaseenhamdulay]

➜ termdash/tcell/tcell git:(5430f4d) TERM= go test
--- FAIL: TestNewTerminalColorMode (0.01s)
--- FAIL: TestNewTerminalColorMode/default_options (0.01s)
tcell_test.go:52: newTerminal => unexpected error:
exit status 1
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x5bf350]

goroutine 157 [running]:
testing.tRunner.func1.1(0x5f3180, 0x83b370)
/usr/lib/google-golang/src/testing/testing.go:941 +0x3d0
testing.tRunner.func1(0xc0001e6ea0)
/usr/lib/google-golang/src/testing/testing.go:944 +0x3f9
panic(0x5f3180, 0x83b370)
/usr/lib/google-golang/src/runtime/panic.go:967 +0x15d
github.com/mum4k/termdash/terminal/tcell.TestNewTerminalColorMode.func1(0xc0001e6ea0)
/usr/local/google/home/yaseenh/go/src/github.com/mum4k/termdash/terminal/tcell/tcell_test.go:56 +0xc0
testing.tRunner(0xc0001e6ea0, 0xc0001d2f30)
/usr/lib/google-golang/src/testing/testing.go:992 +0xdc
created by testing.(*T).Run
/usr/lib/google-golang/src/testing/testing.go:1043 +0x357
exit status 2
FAIL github.com/mum4k/termdash/terminal/tcell 0.040s