Pkg.test("DebuggerFramework") fails on Windows

Exact error message can be found below

julia> Pkg.test("DebuggerFramework")
INFO: Computing test dependencies for DebuggerFramework...
INFO: Installing AbstractTrees v0.1.0
INFO: Installing VT100 v0.2.3
INFO: Testing DebuggerFramework
ERROR: LoadError: LoadError: UndefVarError: PTY not defined
Stacktrace:
 [1] include_from_node1(::String) at .\loading.jl:576
 [2] include(::String) at .\sysimg.jl:14
 [3] include_from_node1(::String) at .\loading.jl:576
 [4] include(::String) at .\sysimg.jl:14
 [5] process_options(::Base.JLOptions) at .\client.jl:305
 [6] _start() at .\client.jl:371
while loading C:\Users\harsha\AppData\Local\JuliaPro-0.6.2.1\pkgs-0.6.2.1\v0.6\VT100\test\TerminalRegressionTests.jl, in expression starting on line 42
while loading C:\Users\harsha\AppData\Local\JuliaPro-0.6.2.1\pkgs-0.6.2.1\v0.6\DebuggerFramework\test\runtests.jl, in expression starting on line 19
==========================[ ERROR: DebuggerFramework ]==========================

failed process: Process(`'C:\Users\harsha\AppData\Local\JuliaPro-0.6.2.1\Julia-0.6.2\bin\julia.exe' -Cx86-64 '-JC:\Users\harsha\AppData\Local\JuliaPro-0.6.2.1\Julia-0.6.2\lib\julia\sys.dll' --compile=yes --depwarn=yes --check-bounds=yes --code-coverage=none --color=yes --compilecache=yes 'C:\Users\harsha\AppData\Local\JuliaPro-0.6.2.1\pkgs-0.6.2.1\v0.6\DebuggerFramework\test\runtests.jl'`, ProcessExited(1)) [1]

================================================================================
INFO: Removing AbstractTrees v0.1.0
INFO: Removing VT100 v0.2.3
ERROR: DebuggerFramework had test errors

I tested this on both DebuggerFramework master and on latest tagged version
OS = Windows 10
Julia version = 0.6.2

Reproduce the failure with Pkg.test("DebuggerFramework") on Windows, then inspect VT100/test/TerminalRegressionTests.jl around line 42 and DebuggerFramework/test/runtests.jl around line 19. Trace why PTY is undefined on Windows and verify that the DebuggerFramework test suite completes successfully there.