diff --git a/appveyor.yml b/appveyor.yml
index b5ffb4a2..9a493a61 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,6 +2,11 @@ version: 1.0.{build}
 environment:
   matrix:
   - ZSTD_APPVEYOR: "gcc"
+    MAKE_PARAMS: "test"
+    PLATFORM: "mingw32"
+  - ZSTD_APPVEYOR: "gcc"
+    MAKE_PARAMS: "test"
+    PLATFORM: "mingw64"
   - ZSTD_APPVEYOR: "visual"
     CONFIGURATION: "Debug"
     PLATFORM: "Win32"
@@ -18,7 +23,6 @@ environment:
 install:
   - if [%ZSTD_APPVEYOR%]==[gcc] SET PATH_ORIGINAL=%PATH%
   - if [%ZSTD_APPVEYOR%]==[gcc] (
-      SET "MINGW_PARAMS=-C programs zstd fullbench fuzzer zbufftest paramgrill datagen" &&
       SET "CLANG_PARAMS=-C programs zstd fullbench fuzzer zbufftest paramgrill datagen CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion"" &&
       SET "PATH_MINGW32=c:\MinGW\bin;c:\MinGW\usr\bin" &&
       SET "PATH_MINGW64=c:\msys64\mingw64\bin;c:\msys64\usr\bin" &&
@@ -29,24 +33,9 @@ install:
 
 build_script:
   - ECHO Building %ZSTD_APPVEYOR%
-  - if [%ZSTD_APPVEYOR%]==[gcc] SET PATH=%PATH_MINGW32%;%PATH_ORIGINAL% 
-  - if [%ZSTD_APPVEYOR%]==[gcc] (
-      ECHO *** &&
-      ECHO *** Building mingw32 &&
-      ECHO *** &&
-      ECHO make %MINGW_PARAMS% &&
-      make %MINGW_PARAMS% &&
-      COPY programs\fuzzer.exe projects\fuzzer_mingw32.exe &&
-      make clean
-    )
-  - if [%ZSTD_APPVEYOR%]==[gcc] SET PATH=%PATH_MINGW64%;%PATH_ORIGINAL% 
-  - if [%ZSTD_APPVEYOR%]==[gcc] (
-      ECHO *** &&
-      ECHO *** Building mingw64 &&
-      ECHO *** &&
-      ECHO make %MINGW_PARAMS% &&
-      make %MINGW_PARAMS% &&
-      COPY programs\fuzzer.exe projects\fuzzer_mingw64.exe &&
+  - if [%PLATFORM%]==[mingw32] SET PATH=%PATH_MINGW32%;%PATH_ORIGINAL% 
+  - if [%PLATFORM%]==[mingw64] SET PATH=%PATH_MINGW64%;%PATH_ORIGINAL% 
+  - if [%PLATFORM%]==[mingw64] (
       make clean &&
       ECHO *** &&
       ECHO *** Building clang &&
@@ -56,6 +45,15 @@ build_script:
       COPY programs\fuzzer.exe projects\fuzzer_clang.exe &&
       make clean
     )
+  - if [%ZSTD_APPVEYOR%]==[gcc] (
+      ECHO *** &&
+      ECHO *** Building %PLATFORM% &&
+      ECHO *** &&
+      ECHO make %MAKE_PARAMS% &&
+      make %MAKE_PARAMS% &&
+      COPY programs\fuzzer.exe projects\fuzzer_%PLATFORM%.exe &&
+      make clean
+    )
   - if [%ZSTD_APPVEYOR%]==[visual] (
       ECHO *** &&
       ECHO *** Building Visual Studio 2008 %PLATFORM%\%CONFIGURATION% &&
@@ -82,14 +80,14 @@ build_script:
       ECHO *** &&
       msbuild "projects\VS2010\zstd.sln" /m /verbosity:normal /property:PlatformToolset=v140 /t:Clean,Build /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
       COPY projects\VS2010\bin\%PLATFORM%\%CONFIGURATION%\fuzzer.exe projects\fuzzer_VS2015_%PLATFORM%_%CONFIGURATION%.exe
+      COPY projects\VS2010\bin\%PLATFORM%\%CONFIGURATION%\zstd.exe projects\zstd_VS2015_%PLATFORM%_%CONFIGURATION%.exe
     )
 
 test_script:
   - SET FUZZERTEST=-T1mn
   - if [%ZSTD_APPVEYOR%]==[gcc] (
-      projects\fuzzer_mingw32.exe %FUZZERTEST% &&
-      projects\fuzzer_mingw64.exe %FUZZERTEST% &&
-      projects\fuzzer_clang.exe %FUZZERTEST%
+      projects\fuzzer_%PLATFORM%.exe %FUZZERTEST% &&
+      if [%PLATFORM%]==[mingw64] projects\fuzzer_clang.exe %FUZZERTEST%
     )
   - if [%ZSTD_APPVEYOR%]==[visual] if [%CONFIGURATION%]==[Release] (
       projects\fuzzer_VS2008_%PLATFORM%_Release.exe %FUZZERTEST% &&
diff --git a/programs/Makefile b/programs/Makefile
index 70434ced..339427e2 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -163,7 +163,11 @@ clean:
 
 #------------------------------------------------------------------------
 #make install is validated only for Linux, OSX, kFreeBSD and Hurd targets
+#------------------------------------------------------------------------
 ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU))
+HOST_OS = POSIX
+zstd-playTests: datagen
+	ZSTD=$(ZSTD) ./tests/playTests.sh $(ZSTDRTTEST)
 
 install: zstd
 	@echo Installing binaries
@@ -186,15 +190,41 @@ uninstall:
 	[ -f $(DESTDIR)$(MANDIR)/zstd.1 ] && rm -f $(DESTDIR)$(MANDIR)/zstd.1
 	@echo zstd programs successfully uninstalled
 
+valgrindTest: VALGRIND = valgrind --leak-check=full --error-exitcode=1
+valgrindTest: zstd datagen fuzzer fullbench zbufftest
+	@echo "\n ---- valgrind tests : memory analyzer ----"
+	$(VALGRIND) ./datagen -g50M > $(VOID)
+	$(VALGRIND) ./zstd ; if [ $$? -eq 0 ] ; then echo "zstd without argument should have failed"; false; fi
+	./datagen -g80 | $(VALGRIND) ./zstd - -c > $(VOID)
+	./datagen -g16KB | $(VALGRIND) ./zstd -vf - -o $(VOID)
+	./datagen -g2930KB | $(VALGRIND) ./zstd -5 -vf - -o tmp
+	$(VALGRIND) ./zstd -vdf tmp -o $(VOID)
+	./datagen -g64MB | $(VALGRIND) ./zstd -vf - -o $(VOID)
+	@rm tmp
+	$(VALGRIND) ./fuzzer -T1mn -t1
+	$(VALGRIND) ./fullbench -i1
+	$(VALGRIND) ./zbufftest -T1mn
+
+endif
+
+
+ifneq (,$(filter MSYS%,$(shell uname)))
+HOST_OS = MSYS
+zstd-playTests: datagen
+	ZSTD=$(ZSTD) ./tests/playTestsMSYS.sh $(ZSTDRTTEST)
+endif
+
+
+#------------------------------------------------------------------------
+#make tests validated only for MSYS, Linux, OSX, kFreeBSD and Hurd targets
+#------------------------------------------------------------------------
+ifneq (,$(filter $(HOST_OS),MSYS POSIX))
 test: test-zstd test-fullbench test-fuzzer test-zbuff
 
 test32: test-zstd32 test-fullbench32 test-fuzzer32 test-zbuff32
 
 test-all: test test32 valgrindTest
 
-zstd-playTests: datagen
-	ZSTD=$(ZSTD) ./playTests.sh $(ZSTDRTTEST)
-
 test-zstd: ZSTD = ./zstd
 test-zstd: zstd zstd-playTests
 
@@ -223,20 +253,4 @@ test-zbuff: zbufftest
 
 test-zbuff32: zbufftest32
 	./zbufftest32 $(ZBUFFTEST)
-
-valgrindTest: VALGRIND = valgrind --leak-check=full --error-exitcode=1
-valgrindTest: zstd datagen fuzzer fullbench zbufftest
-	@echo "\n ---- valgrind tests : memory analyzer ----"
-	$(VALGRIND) ./datagen -g50M > $(VOID)
-	$(VALGRIND) ./zstd ; if [ $$? -eq 0 ] ; then echo "zstd without argument should have failed"; false; fi
-	./datagen -g80 | $(VALGRIND) ./zstd - -c > $(VOID)
-	./datagen -g16KB | $(VALGRIND) ./zstd -vf - -o $(VOID)
-	./datagen -g2930KB | $(VALGRIND) ./zstd -5 -vf - -o tmp
-	$(VALGRIND) ./zstd -vdf tmp -o $(VOID)
-	./datagen -g64MB | $(VALGRIND) ./zstd -vf - -o $(VOID)
-	@rm tmp
-	$(VALGRIND) ./fuzzer -T1mn -t1
-	$(VALGRIND) ./fullbench -i1
-	$(VALGRIND) ./zbufftest -T1mn
-
 endif
diff --git a/programs/playTests.sh b/programs/tests/playTests.sh
old mode 100755
new mode 100644
similarity index 100%
rename from programs/playTests.sh
rename to programs/tests/playTests.sh
diff --git a/programs/tests/playTestsMSYS.sh b/programs/tests/playTestsMSYS.sh
new file mode 100644
index 00000000..82f2357b
--- /dev/null
+++ b/programs/tests/playTestsMSYS.sh
@@ -0,0 +1,160 @@
+#!/bin/sh -e
+
+die() {
+    echo "$@" 1>&2
+    exit 1
+}
+
+roundTripTest() {
+    if [ -n "$3" ]; then
+        local c="$3"
+        local p="$2"
+    else
+        local c="$2"
+    fi
+
+    rm -f tmp1 tmp2
+    echo "roundTripTest: ./datagen $1 $p | $ZSTD -v$c | $ZSTD -d"
+    ./datagen $1 $p | md5sum > tmp1
+    ./datagen $1 $p | $ZSTD -vq$c | $ZSTD -d  | md5sum > tmp2
+    fc tmp1 tmp2
+}
+
+[ -n "$ZSTD" ] || die "ZSTD variable must be defined!"
+
+
+echo "\n**** simple tests **** "
+./datagen > tmp
+$ZSTD -f tmp                             # trivial compression case, creates tmp.zst
+$ZSTD -df tmp.zst                        # trivial decompression case (overwrites tmp)
+echo "test : too large compression level (must fail)"
+$ZSTD -99 tmp && die "too large compression level undetected"
+echo "test : compress to stdout"
+$ZSTD tmp -c > tmpCompressed                 
+$ZSTD tmp --stdout > tmpCompressed       # long command format
+echo "test : null-length file roundtrip"
+echo -n '' | $ZSTD - --stdout | $ZSTD -d --stdout
+echo "test : decompress file with wrong suffix (must fail)"
+$ZSTD -d tmpCompressed && die "wrong suffix error not detected!"
+$ZSTD -d tmpCompressed -c > tmpResult    # decompression using stdout   
+$ZSTD --decompress tmpCompressed -c > tmpResult
+$ZSTD --decompress tmpCompressed --stdout > tmpResult
+#$ZSTD -d    < tmp.zst > /dev/null        # combine decompression, stdin & stdout
+#$ZSTD -d  - < tmp.zst > /dev/null
+$ZSTD -dc   < tmp.zst > /dev/null
+$ZSTD -dc - < tmp.zst > /dev/null
+$ZSTD -q tmp && die "overwrite check failed!"
+$ZSTD -q -f tmp
+$ZSTD -q --force tmp
+$ZSTD -df tmp && die "should have refused : wrong extension"
+cp tmp tmp2.zst
+$ZSTD -df tmp2.zst && die "should have failed : wrong format"
+rm tmp2.zst
+
+echo "\n**** frame concatenation **** "
+
+echo "hello " > hello.tmp
+echo "world!" > world.tmp
+cat hello.tmp world.tmp > helloworld.tmp
+$ZSTD -c hello.tmp > hello.zstd
+$ZSTD -c world.tmp > world.zstd
+cat hello.zstd world.zstd > helloworld.zstd
+$ZSTD -dc helloworld.zstd > result.tmp
+cat result.tmp
+fc helloworld.tmp result.tmp
+rm ./*.tmp ./*.zstd
+
+echo frame concatenation test completed
+
+
+echo "\n**** dictionary tests **** "
+
+./datagen > tmpDict
+./datagen -g1M | md5sum > tmp1
+./datagen -g1M | $ZSTD -D tmpDict | $ZSTD -D tmpDict -dvq | md5sum > tmp2
+fc tmp1 tmp2
+$ZSTD --train *.c *.h -o tmpDict
+$ZSTD xxhash.c -D tmpDict -of tmp
+$ZSTD -d tmp -D tmpDict -of result
+fc xxhash.c result
+
+
+echo "\n**** multiple files tests **** "
+
+./datagen -s1        > tmp1 2> /dev/null
+./datagen -s2 -g100K > tmp2 2> /dev/null
+./datagen -s3 -g1M   > tmp3 2> /dev/null
+$ZSTD -f tmp*
+echo "compress tmp* : "
+ls -ls tmp*
+rm tmp1 tmp2 tmp3
+echo "decompress tmp* : "
+$ZSTD -df *.zst
+ls -ls tmp*
+echo "compress tmp* into stdout > tmpall : "
+$ZSTD -c tmp1 tmp2 tmp3 > tmpall
+ls -ls tmp*
+echo "decompress tmpall* into stdout > tmpdec : "
+cp tmpall tmpall2
+# $ZSTD -dc tmpall* > tmpdec
+ls -ls tmp*
+echo "compress multiple files including a missing one (notHere) : "
+$ZSTD -f tmp1 notHere tmp2 && die "missing file not detected!"
+
+echo "\n**** integrity tests **** "
+echo "test one file (tmp1.zst) "
+$ZSTD -t tmp1.zst
+$ZSTD --test tmp1.zst
+echo "test multiple files (*.zst) "
+$ZSTD -t *.zst
+echo "test good and bad files (*) "
+$ZSTD -t * && die "bad files not detected !"
+
+echo "\n**** zstd round-trip tests **** "
+
+roundTripTest
+roundTripTest -g15K       # TableID==3
+roundTripTest -g127K      # TableID==2
+roundTripTest -g255K      # TableID==1
+roundTripTest -g513K      # TableID==0
+roundTripTest -g512K 6    # greedy, hash chain
+roundTripTest -g512K 16   # btlazy2 
+roundTripTest -g512K 19   # btopt
+
+rm tmp*
+
+if [ "$1" != "--test-large-data" ]; then
+    echo "Skipping large data tests"
+    exit 0
+fi
+
+roundTripTest -g270000000 1
+roundTripTest -g270000000 2
+roundTripTest -g270000000 3
+
+roundTripTest -g140000000 -P60 4
+roundTripTest -g140000000 -P60 5
+roundTripTest -g140000000 -P60 6
+
+roundTripTest -g70000000 -P70 7
+roundTripTest -g70000000 -P70 8
+roundTripTest -g70000000 -P70 9
+
+roundTripTest -g35000000 -P75 10
+roundTripTest -g35000000 -P75 11
+roundTripTest -g35000000 -P75 12
+
+roundTripTest -g18000000 -P80 13
+roundTripTest -g18000000 -P80 14
+roundTripTest -g18000000 -P80 15
+roundTripTest -g18000000 -P80 16
+roundTripTest -g18000000 -P80 17
+
+roundTripTest -g50000000 -P94 18
+roundTripTest -g50000000 -P94 19
+
+roundTripTest -g99000000 -P99 20
+roundTripTest -g6000000000 -P99 1
+
+rm tmp*
+