diff --git a/src/etc/maketest.py b/src/etc/maketest.py
index 9e8bee3abb6c0..7646113560bbb 100644
--- a/src/etc/maketest.py
+++ b/src/etc/maketest.py
@@ -12,26 +12,53 @@
 import os
 import sys
 
-# FIXME #12303 these tests are broken on windows
-if os.name == 'nt':
-    print 'ignoring make tests on windows'
-    sys.exit(0)
+# msys1/msys2 automatically converts `/abs/path1:/abs/path2` into
+# `c:\real\abs\path1;c:\real\abs\path2` (semicolons) if shell thinks
+# the value is list of paths.
+# this causes great confusion and error: shell and Makefile doesn't like
+# windows paths so it is really error-prone. revert it for peace.
+def normalize_path(v):
+    # c:\path -> /c/path
+    if ':\\' in v:
+        v = '/' + v.replace(':\\', '/')
+    v = v.replace('\\', '/')
+    return v
+
+
+def putenv(name, value):
+    if os.name == 'nt':
+        value = normalize_path(value)
+    os.putenv(name, value)
+
 
 make = sys.argv[2]
-os.putenv('RUSTC', os.path.abspath(sys.argv[3]))
-os.putenv('TMPDIR', os.path.abspath(sys.argv[4]))
-os.putenv('CC', sys.argv[5])
-os.putenv('RUSTDOC', os.path.abspath(sys.argv[6]))
+putenv('RUSTC', os.path.abspath(sys.argv[3]))
+putenv('TMPDIR', os.path.abspath(sys.argv[4]))
+putenv('CC', sys.argv[5])
+putenv('RUSTDOC', os.path.abspath(sys.argv[6]))
 filt = sys.argv[7]
 ldpath = sys.argv[8]
 if ldpath != '':
-    os.putenv(ldpath.split('=')[0], ldpath.split('=')[1])
+    name = ldpath.split('=')[0]
+    value = ldpath.split('=')[1]
+    if os.name == 'nt' and name != 'PATH':
+        value = ":".join(normalize_path(v) for v in value.split(";"))
+    os.putenv(name, value)
 
 if not filt in sys.argv[1]:
     sys.exit(0)
 print('maketest: ' + os.path.basename(os.path.dirname(sys.argv[1])))
 
-proc = subprocess.Popen([make, '-C', sys.argv[1]],
+path = sys.argv[1]
+if path[-1] == '/':
+    # msys1 has a bug that `make` fails to include `../tools.mk` (parent dir)
+    # if `-C path` option is given and `path` is absolute directory with
+    # trailing slash (`c:/path/to/test/`).
+    # the easist workaround is to remove the slash (`c:/path/to/test`).
+    # msys2 seems to fix this problem.
+    path = path[:-1]
+
+proc = subprocess.Popen([make, '-C', path],
                         stdout = subprocess.PIPE,
                         stderr = subprocess.PIPE)
 out, err = proc.communicate()
diff --git a/src/test/run-make/c-link-to-rust-staticlib/Makefile b/src/test/run-make/c-link-to-rust-staticlib/Makefile
index 78ac1f66bfcbe..7312a65c81238 100644
--- a/src/test/run-make/c-link-to-rust-staticlib/Makefile
+++ b/src/test/run-make/c-link-to-rust-staticlib/Makefile
@@ -1,10 +1,12 @@
 -include ../tools.mk
 
+ifndef IS_WINDOWS
 ifneq ($(shell uname),Darwin)
 	EXTRAFLAGS := -lm -lrt -ldl -lpthread
 endif
+endif
 
-# FIXME
+# FIXME: ignore freebsd
 ifneq ($(shell uname),FreeBSD)
 all:
 	$(RUSTC) foo.rs
diff --git a/src/test/run-make/dep-info-custom/Makefile b/src/test/run-make/dep-info-custom/Makefile
index ca70ccae3dae9..efa6dfe981bb6 100644
--- a/src/test/run-make/dep-info-custom/Makefile
+++ b/src/test/run-make/dep-info-custom/Makefile
@@ -1,7 +1,9 @@
 -include ../tools.mk
 
-# FIXME
+# FIXME: ignore freebsd/windows
+# (windows: see `../dep-info/Makefile`)
 ifneq ($(shell uname),FreeBSD)
+ifndef IS_WINDOWS
 all:
 	$(RUSTC) --dep-info $(TMPDIR)/custom-deps-file.d --crate-type=lib lib.rs
 	sleep 1
@@ -16,3 +18,8 @@ else
 all:
 
 endif
+
+else
+all:
+
+endif
diff --git a/src/test/run-make/dep-info/Makefile b/src/test/run-make/dep-info/Makefile
index 277e7ad629448..6835ef34b0b20 100644
--- a/src/test/run-make/dep-info/Makefile
+++ b/src/test/run-make/dep-info/Makefile
@@ -1,6 +1,11 @@
 -include ../tools.mk
 
+# FIXME: ignore freebsd/windows
+# on windows `rustc --dep-info` produces Makefile dependency with
+# windows native paths (e.g. `c:\path\to\libfoo.a`)
+# but msys make seems to fail to recognize such paths, so test fails.
 ifneq ($(shell uname),FreeBSD)
+ifndef IS_WINDOWS
 all:
 	$(RUSTC) --dep-info --crate-type=lib lib.rs
 	sleep 2
@@ -16,3 +21,8 @@ else
 all:
 
 endif
+
+else
+all:
+
+endif
diff --git a/src/test/run-make/lto-smoke-c/Makefile b/src/test/run-make/lto-smoke-c/Makefile
index de8588bac9b7c..85b8d0e2dd82a 100644
--- a/src/test/run-make/lto-smoke-c/Makefile
+++ b/src/test/run-make/lto-smoke-c/Makefile
@@ -1,5 +1,8 @@
 -include ../tools.mk
 
+ifdef IS_WINDOWS
+	EXTRAFLAGS :=
+else
 ifeq ($(shell uname),Darwin)
 else
 ifeq ($(shell uname),FreeBSD)
@@ -8,6 +11,7 @@ else
 	EXTRAFLAGS := -lm -lrt -ldl -lpthread
 endif
 endif
+endif
 
 # Apparently older versions of GCC segfault if -g is passed...
 CC := $(CC:-g=)
diff --git a/src/test/run-make/no-intermediate-extras/foo.rs b/src/test/run-make/no-intermediate-extras/foo.rs
index e69de29bb2d1d..60a7f067476b0 100644
--- a/src/test/run-make/no-intermediate-extras/foo.rs
+++ b/src/test/run-make/no-intermediate-extras/foo.rs
@@ -0,0 +1,14 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// FIXME #13793
+#[test]
+fn test_dummy() {
+}
diff --git a/src/test/run-make/obey-crate-type-flag/Makefile b/src/test/run-make/obey-crate-type-flag/Makefile
index c28bc7c7b5e93..a3c58a6bf17fe 100644
--- a/src/test/run-make/obey-crate-type-flag/Makefile
+++ b/src/test/run-make/obey-crate-type-flag/Makefile
@@ -7,7 +7,7 @@
 # fail if an rlib was built
 all:
 	$(RUSTC) test.rs
-	rm $(TMPDIR)/libtest*.rlib
-	rm $(TMPDIR)/libtest*
+	rm $(TMPDIR)/$(call RLIB_GLOB,test)
+	rm $(TMPDIR)/$(call DYLIB_GLOB,test)
 	$(RUSTC) --crate-type dylib test.rs
-	rm $(TMPDIR)/libtest*.rlib && exit 1 || exit 0
+	rm $(TMPDIR)/$(call RLIB_GLOB,test) && exit 1 || exit 0
diff --git a/src/test/run-make/output-type-permutations/Makefile b/src/test/run-make/output-type-permutations/Makefile
index 94e0ce833438f..5a309cddeb184 100644
--- a/src/test/run-make/output-type-permutations/Makefile
+++ b/src/test/run-make/output-type-permutations/Makefile
@@ -6,13 +6,13 @@ all:
 	rm $(TMPDIR)/$(call DYLIB_GLOB,bar)
 	rm $(TMPDIR)/$(call STATICLIB_GLOB,bar)
 	$(RUSTC) foo.rs --crate-type=bin
-	rm $(TMPDIR)/bar
+	rm $(TMPDIR)/$(call BIN,bar)
 	$(RUSTC) foo.rs --emit=asm,ir,bc,obj,link
 	rm $(TMPDIR)/bar.ll
 	rm $(TMPDIR)/bar.bc
 	rm $(TMPDIR)/bar.s
 	rm $(TMPDIR)/bar.o
-	rm $(TMPDIR)/bar
+	rm $(TMPDIR)/$(call BIN,bar)
 	$(RUSTC) foo.rs --emit=asm,ir,bc,obj,link --crate-type=staticlib
 	rm $(TMPDIR)/bar.ll
 	rm $(TMPDIR)/bar.s
@@ -27,15 +27,15 @@ all:
 	$(RUSTC) foo.rs --emit=obj -o $(TMPDIR)/foo
 	rm $(TMPDIR)/foo
 	$(RUSTC) foo.rs --emit=link -o $(TMPDIR)/foo
-	rm $(TMPDIR)/foo
+	rm $(TMPDIR)/$(call BIN,foo)
 	$(RUSTC) foo.rs --crate-type=rlib -o $(TMPDIR)/foo
 	rm $(TMPDIR)/foo
 	$(RUSTC) foo.rs --crate-type=dylib -o $(TMPDIR)/foo
-	rm $(TMPDIR)/foo
+	rm $(TMPDIR)/$(call BIN,foo)  # FIXME 13794
 	$(RUSTC) foo.rs --crate-type=staticlib -o $(TMPDIR)/foo
 	rm $(TMPDIR)/foo
 	$(RUSTC) foo.rs --crate-type=bin -o $(TMPDIR)/foo
-	rm $(TMPDIR)/foo
+	rm $(TMPDIR)/$(call BIN,foo)
 	mv $(TMPDIR)/bar.bc $(TMPDIR)/foo.bc
 	$(RUSTC) foo.rs --emit=bc,link --crate-type=rlib
 	cmp $(TMPDIR)/foo.bc $(TMPDIR)/bar.bc
diff --git a/src/test/run-make/prune-link-args/Makefile b/src/test/run-make/prune-link-args/Makefile
index ea7fa06f5ef19..a6e219873dfd2 100644
--- a/src/test/run-make/prune-link-args/Makefile
+++ b/src/test/run-make/prune-link-args/Makefile
@@ -1,6 +1,11 @@
 -include ../tools.mk
+ifdef IS_WINDOWS
+# ignore windows
+RUSTC_FLAGS =
+else
 # Notice the space in the end, this emulates the output of pkg-config
 RUSTC_FLAGS = -C link-args="-lc "
+endif
 
 all:
 	$(RUSTC) $(RUSTC_FLAGS) empty.rs
diff --git a/src/test/run-make/rustdoc-hidden-line/Makefile b/src/test/run-make/rustdoc-hidden-line/Makefile
index 7e6f8fe105e92..b67c1f66dd954 100644
--- a/src/test/run-make/rustdoc-hidden-line/Makefile
+++ b/src/test/run-make/rustdoc-hidden-line/Makefile
@@ -1,7 +1,15 @@
 -include ../tools.mk
 
+# FIXME ignore windows
+ifndef IS_WINDOWS
+
 all:
 	$(RUSTDOC) --test foo.rs
 	$(RUSTDOC) -w html -o $(TMPDIR)/doc foo.rs
 	cp verify.sh $(TMPDIR)
 	$(call RUN,verify.sh) $(TMPDIR)
+
+else
+all:
+
+endif
diff --git a/src/test/run-make/symlinked-libraries/Makefile b/src/test/run-make/symlinked-libraries/Makefile
index 45ef241c28f7f..9eb2c13523006 100644
--- a/src/test/run-make/symlinked-libraries/Makefile
+++ b/src/test/run-make/symlinked-libraries/Makefile
@@ -1,7 +1,15 @@
 -include ../tools.mk
 
+# ignore windows: `ln` is actually `cp` on msys.
+ifndef IS_WINDOWS
+
 all:
 	$(RUSTC) foo.rs
 	mkdir -p $(TMPDIR)/other
 	ln -nsf $(TMPDIR)/$(call DYLIB_GLOB,foo) $(TMPDIR)/other
 	$(RUSTC) bar.rs -L $(TMPDIR)/other
+
+else
+all:
+
+endif
diff --git a/src/test/run-make/tools.mk b/src/test/run-make/tools.mk
index 26e6e06c2ed8a..90274cdb3e7aa 100644
--- a/src/test/run-make/tools.mk
+++ b/src/test/run-make/tools.mk
@@ -10,14 +10,27 @@ FAILS = $(TMPDIR)/$(1) && exit 1 || exit 0
 RLIB_GLOB = lib$(1)*.rlib
 STATICLIB = $(TMPDIR)/lib$(1).a
 STATICLIB_GLOB = lib$(1)*.a
+BIN = $(1)
 
-ifeq ($(shell uname),Darwin)
+UNAME = $(shell uname)
+ifneq (,$(findstring MINGW,$(UNAME)))
+IS_WINDOWS=1
+endif
+
+ifeq ($(UNAME),Darwin)
 DYLIB_GLOB = lib$(1)*.dylib
 DYLIB = $(TMPDIR)/lib$(1).dylib
 else
+ifdef IS_WINDOWS
+DYLIB_GLOB = $(1)*.dll
+DYLIB = $(TMPDIR)/$(1).dll
+BIN = $(1).exe
+export PATH := $(PATH):$(LD_LIBRARY_PATH)
+else
 DYLIB_GLOB = lib$(1)*.so
 DYLIB = $(TMPDIR)/lib$(1).so
 endif
+endif
 
 %.a: %.o
 	ar crus $@ $<
@@ -25,6 +38,9 @@ endif
 	$(CC) -dynamiclib -Wl,-dylib -o $@ $<
 %.so: %.o
 	$(CC) -o $@ $< -shared
+%.dll: lib%.o
+	$(CC) -o $@ $< -shared
+
 $(TMPDIR)/lib%.o: %.c
 	$(CC) -c -o $@ $<
 
diff --git a/src/test/run-make/unicode-input/Makefile b/src/test/run-make/unicode-input/Makefile
index 2d6ecd3c55efc..529bfc24a400a 100644
--- a/src/test/run-make/unicode-input/Makefile
+++ b/src/test/run-make/unicode-input/Makefile
@@ -1,5 +1,8 @@
 -include ../tools.mk
 
+# FIXME ignore windows
+ifndef IS_WINDOWS
+
 all:
 	# check that we don't ICE on unicode input, issue #11178
 	$(RUSTC) multiple_files.rs
@@ -9,3 +12,8 @@ all:
 	# correct length. issue #8706
 	$(RUSTC) span_length.rs
 	$(call RUN,span_length) "$(RUSTC)" "$(TMPDIR)"
+
+else
+all:
+
+endif
diff --git a/src/test/run-make/weird-output-filenames/Makefile b/src/test/run-make/weird-output-filenames/Makefile
index 9d852bce6f6a0..debd89d9929b7 100644
--- a/src/test/run-make/weird-output-filenames/Makefile
+++ b/src/test/run-make/weird-output-filenames/Makefile
@@ -6,4 +6,4 @@ all:
 	$(RUSTC) foo.rs -o $(TMPDIR)/.foo.bar
 	rm $(TMPDIR)/.foo.bar
 	$(RUSTC) foo.rs -o $(TMPDIR)/+foo+bar
-	rm $(TMPDIR)/+foo+bar
+	rm $(TMPDIR)/$(call BIN,+foo+bar)