diff --git a/.travis.yml b/.travis.yml
index b20c43329..3c77a17e1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,31 +4,35 @@ dist: trusty
 matrix:
   fast_finish: true
   include:
+    # other feature branches => short tests
+    - env: Cmd="make libc6install && make -C tests test32"
+    - env: Cmd='make valgrindinstall arminstall ppcinstall arm-ppc-compilation && make clean lib && CFLAGS="-O1 -g" make -C zlibWrapper valgrindTest && make -C tests valgrindTest'
+
+    - env: Cmd='CC=gcc-6 make gcc6install uasan-test'
+    - env: Cmd='CC=gcc-6 make gcc6install uasan-test32'
+    - env: Cmd="make arminstall armtest && make clean && make aarch64test"
+    - env: Cmd='make ppcinstall ppctest && make clean && make ppc64test'
+    - env: Cmd='make gpp6install zlibwrapper && make -C tests clean test-zstd-nolegacy && make -C tests versionsTest && make clean && cd contrib/pzstd && make test-pzstd && make test-pzstd32 && make test-pzstd-tsan && make test-pzstd-asan'
+      install:
+        - export CXX="g++-6" CC="gcc-6"
+
     # OS X Mavericks
     - env: Cmd="make gnu90test && make clean && make test && make clean && make travis-install"
       os: osx
 
-    # Ubuntu 14.04 LTS Server Edition 64 bit
-    - env: Cmd='make gpp6install uasan-test && cd contrib/pzstd && make test-pzstd && make test-pzstd32 && make test-pzstd-tsan && make test-pzstd-asan'
-      install:
-        - export CXX="g++-6" CC="gcc-6"
-    - env: Cmd='CC=gcc-6 make gcc6install uasan-test32 && make clean zlibwrapper && make -C tests clean test-zstd-nolegacy && make -C tests versionsTest'
-    - env: Cmd="make arminstall armtest && make clean && make aarch64test"
-    - env: Cmd='make ppcinstall ppctest && make clean && make ppc64test'
-
-    # other feature branches => short tests
-    - env: Cmd='make valgrindinstall arminstall ppcinstall arm-ppc-compilation && make clean lib && CFLAGS="-O1 -g" make -C zlibWrapper valgrindTest && make -C tests valgrindTest'
-    - env: Cmd="make libc6install && make -C tests test32"
-
 script:
   - JOB_NUMBER=$(echo $TRAVIS_JOB_NUMBER | sed -e 's:[0-9][0-9]*\.\(.*\):\1:')
-  #  cron & master          => long tests, as this is the final step towards a Release
-  #  dev && pull requests   => normal tests
-  #  other feature branches => short tests (number > 5)
+  #  cron & master          => full tests, as this is the final step towards a Release
+  #  pull requests          => normal tests (job numbers 1-3)
+  #  other feature branches => short tests (job numbers 1-2)
   - if [ "$TRAVIS_EVENT_TYPE" = "cron" ] || [ "$TRAVIS_BRANCH" = "master" ]; then
         FUZZERTEST=-T7mn sh -c "$Cmd" || travis_terminate 1;
     else
-        if [ "$TRAVIS_PULL_REQUEST" = "true" ] || [ $JOB_NUMBER -gt 5 ] || [ "$TRAVIS_BRANCH" = "dev" ]; then
+        if [ "$TRAVIS_PULL_REQUEST" == "true" ] && [ $JOB_NUMBER -lt 4 ]; then
             sh -c "$Cmd" || travis_terminate 1;
+        else
+            if [ $JOB_NUMBER -lt 3 ]; then
+                sh -c "$Cmd" || travis_terminate 1;
+            fi
         fi
     fi
diff --git a/tests/decodecorpus.c b/tests/decodecorpus.c
index d75025a83..8de5c252b 100644
--- a/tests/decodecorpus.c
+++ b/tests/decodecorpus.c
@@ -609,7 +609,7 @@ static U32 generateSequences(U32* seed, frame_t* frame, seqStore_t* seqStore,
 {
     /* The total length of all the matches */
     size_t const remainingMatch = contentSize - literalsSize;
-    size_t excessMatch;
+    size_t excessMatch = 0;
     U32 i;
 
     U32 numSequences;
diff --git a/zlibWrapper/zstd_zlibwrapper.h b/zlibWrapper/zstd_zlibwrapper.h
index 382716921..0ebd87612 100644
--- a/zlibWrapper/zstd_zlibwrapper.h
+++ b/zlibWrapper/zstd_zlibwrapper.h
@@ -30,7 +30,13 @@ const char * zstdVersion(void);
 
 
 /*** COMPRESSION ***/
-/* enables/disables zstd compression during runtime */
+/* ZWRAP_useZSTDcompression() enables/disables zstd compression during runtime.
+   By default zstd compression is disabled. To enable zstd compression please use one of the methods:
+   - compilation with the additional option -DZWRAP_USE_ZSTD=1 
+   - using '#define ZWRAP_USE_ZSTD 1' in source code before '#include "zstd_zlibwrapper.h"'
+   - calling ZWRAP_useZSTDcompression(1)
+   All above-mentioned methods will enable zstd compression for all threads.
+   Be aware that ZWRAP_useZSTDcompression() is not thread-safe and may lead to a race condition. */
 void ZWRAP_useZSTDcompression(int turn_on);
 
 /* checks if zstd compression is turned on */
@@ -54,7 +60,11 @@ int ZWRAP_deflateReset_keepDict(z_streamp strm);
 /*** DECOMPRESSION ***/
 typedef enum { ZWRAP_FORCE_ZLIB, ZWRAP_AUTO } ZWRAP_decompress_type;
 
-/* enables/disables automatic recognition of zstd/zlib compressed data during runtime */
+/* ZWRAP_setDecompressionType() enables/disables automatic recognition of zstd/zlib compressed data during runtime.
+   By default auto-detection of zstd and zlib streams in enabled (ZWRAP_AUTO).
+   Forcing zlib decompression with ZWRAP_setDecompressionType(ZWRAP_FORCE_ZLIB) slightly improves
+   decompression speed of zlib-encoded streams.
+   Be aware that ZWRAP_setDecompressionType() is not thread-safe and may lead to a race condition. */
 void ZWRAP_setDecompressionType(ZWRAP_decompress_type type);
 
 /* checks zstd decompression type */