Test 'https_proxy.t' fails on windows 10

While installing the module through cpan, the 'https_proxy.t' testcase is failing with error - unexpected response: 500 SSL upgrade failed: SSL connect attempt failed error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

The error is similar to https://github.com/libwww-perl/LWP-Protocol-https/issues/58. Since the test case is different and different OS hence creating this ticket. Installing it on personal PC hence no corporate firewall.

Perl version - Strawberry Perl 5.30.1 built for MSWin32-x64-multi-thread
LWP::UserAgent - 6.42

Here is the full installation log -

PS C:\> cpan install LWP::Protocol::https
Loading internal logger. Log::Log4perl recommended for better logging
CPAN: CPAN::SQLite loaded ok (v0.217)
Database was generated on Sun, 22 Nov 2020 20:05:47 GMT
Running install for module 'LWP::Protocol::https'
CPAN: Digest::SHA loaded ok (v6.02)
CPAN: Compress::Zlib loaded ok (v2.09)
Checksum for C:\berrybrew\5.30.1_64\cpan\sources\authors\id\O\OA\OALDERS\LWP-Protocol-https-6.09.tar.gz ok
CPAN: Archive::Tar loaded ok (v2.32)
CPAN: YAML::XS loaded ok (v0.80)
CPAN: CPAN::Meta::Requirements loaded ok (v2.140)
CPAN: Parse::CPAN::Meta loaded ok (v2.150010)
CPAN: CPAN::Meta loaded ok (v2.150010)
CPAN: Module::CoreList loaded ok (v5.20191120)
Configuring O/OA/OALDERS/LWP-Protocol-https-6.09.tar.gz with Makefile.PL
Checking if your kit is complete...
Looks good
Generating a gmake-style Makefile
Writing Makefile for LWP::Protocol::https
Writing MYMETA.yml and MYMETA.json
  OALDERS/LWP-Protocol-https-6.09.tar.gz
  C:\berrybrew\5.30.1_64\perl\bin\perl.exe Makefile.PL -- OK
Running make for O/OA/OALDERS/LWP-Protocol-https-6.09.tar.gz
cp lib/LWP/Protocol/https.pm blib\lib\LWP\Protocol\https.pm
  OALDERS/LWP-Protocol-https-6.09.tar.gz
  C:\berrybrew\5.30.1_64\c\bin\gmake.exe -- OK
Running make test for OALDERS/LWP-Protocol-https-6.09.tar.gz
"C:\berrybrew\5.30.1_64\perl\bin\perl.exe" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib\lib', 'blib\arch')" t/*.t
t/00-report-prereqs.t .. #
# Versions for all modules listed in MYMETA.json (including optional ones):
#
# === Configure Requires ===
#
#     Module              Want Have
#     ------------------- ---- ----
#     ExtUtils::MakeMaker  any 7.38
#
# === Configure Suggests ===
#
#     Module      Want Have
#     -------- ------- ----
#     JSON::PP 2.27300 4.04
#
# === Build Requires ===
#
#     Module              Want Have
#     ------------------- ---- ----
#     ExtUtils::MakeMaker  any 7.38
#
# === Test Requires ===
#
#     Module                 Want     Have
#     ---------------------- ---- --------
#     ExtUtils::MakeMaker     any     7.38
#     File::Spec              any     3.78
#     File::Temp              any   0.2309
#     IO::Select              any     1.40
#     IO::Socket::INET        any     1.40
#     IO::Socket::SSL        1.54    2.066
#     IO::Socket::SSL::Utils  any    2.014
#     LWP::UserAgent         6.06     6.42
#     Socket                  any    2.029
#     Test::More              any 1.302169
#     Test::RequiresInternet  any     0.05
#     warnings                any     1.44
#
# === Test Recommends ===
#
#     Module         Want     Have
#     ---------- -------- --------
#     CPAN::Meta 2.120900 2.150010
#
# === Runtime Requires ===
#
#     Module                  Want     Have
#     ------------------- -------- --------
#     IO::Socket::SSL         1.54    2.066
#     LWP::Protocol::http      any     6.42
#     LWP::UserAgent          6.06     6.42
#     Mozilla::CA         20180117 20180117
#     Net::HTTPS                 6     6.19
#     base                     any     2.27
#     strict                   any     1.11
#
t/00-report-prereqs.t .. ok
t/apache.t ............. ok
t/https_proxy.t ........ 1/56 # creating cert for direct.ssl.access
# creating cert for direct.ssl.access
# creating cert for foo
unexpected response: 500 SSL upgrade failed: SSL connect attempt failed error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed
Content-Type: text/plain
Client-Date: Sun, 22 Nov 2020 20:14:20 GMT
Client-Warning: Internal response

SSL upgrade failed: SSL connect attempt failed error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed at C:/berrybrew/5.30.1_64/perl/vendor/lib/LWP/Protocol/http.pm line 209.
# Looks like your test exited with 9 just after 36.
t/https_proxy.t ........ Dubious, test returned 9 (wstat 2304, 0x900)
Failed 20/56 subtests
t/method_in_san.t ...... ok

Test Summary Report
-------------------
t/https_proxy.t      (Wstat: 2304 Tests: 36 Failed: 0)
  Non-zero exit status: 9
  Parse errors: Bad plan.  You planned 56 tests but ran 36.
Files=4, Tests=56,  6 wallclock secs ( 0.03 usr +  0.03 sys =  0.06 CPU)
Result: FAIL
Failed 1/4 test programs. 0/56 subtests failed.
gmake: *** [Makefile:890: test_dynamic] Error 255
  OALDERS/LWP-Protocol-https-6.09.tar.gz
  C:\berrybrew\5.30.1_64\c\bin\gmake.exe test -- NOT OK
//hint// to see the cpan-testers results for installing this module, try:
  reports OALDERS/LWP-Protocol-https-6.09.tar.gz
Stopping: 'install' failed for 'LWP::Protocol::https'.

The report identifies t/https_proxy.t and a Windows 10 Strawberry Perl environment. Reproduce that test first, then inspect the SSL proxy exchange and certificate-verification error reported in the log. Done means the test completes all 56 planned tests successfully on the reported setup.