Add a separate build target for the unittests. Hopefully the coverage will be merged then.
diff --git a/.travis.yml b/.travis.yml
index 99694c0..d34898b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,12 +5,13 @@
   - gcc
 
 env:
-  - COVERAGE=yes CFLAGS=--coverage LDFLAGS=--coverage FEATURES=huge SHADOWOPT= SRCDIR=./src
+  - BUILD=yes TEST=scripttests COVERAGE=yes CFLAGS=--coverage LDFLAGS=--coverage FEATURES=huge SHADOWOPT= SRCDIR=./src
+  - BUILD= TEST=unittests COVERAGE=yes CFLAGS=--coverage LDFLAGS=--coverage FEATURES=huge SHADOWOPT= SRCDIR=./src
     "CONFOPT='--enable-perlinterp --enable-pythoninterp --enable-python3interp --enable-rubyinterp --enable-luainterp'"
     CHECK_AUTOCONF=yes
-  - COVERAGE=no FEATURES=normal CONFOPT= SHADOWOPT="-C src/shadow" SRCDIR=./src/shadow CHECK_AUTOCONF=no
-  - COVERAGE=no FEATURES=small CONFOPT= SHADOWOPT= SRCDIR=./src CHECK_AUTOCONF=no
-  - COVERAGE=no FEATURES=tiny  CONFOPT= SHADOWOPT= SRCDIR=./src CHECK_AUTOCONF=no
+  - BUILD=yes TEST=test COVERAGE=no FEATURES=normal CONFOPT= SHADOWOPT="-C src/shadow" SRCDIR=./src/shadow CHECK_AUTOCONF=no
+  - BUILD=yes TEST=test COVERAGE=no FEATURES=small CONFOPT= SHADOWOPT= SRCDIR=./src CHECK_AUTOCONF=no
+  - BUILD=yes TEST=test COVERAGE=no FEATURES=tiny  CONFOPT= SHADOWOPT= SRCDIR=./src CHECK_AUTOCONF=no
 
 sudo: false
 
@@ -35,9 +36,10 @@
 script:
   - NPROC=$(getconf _NPROCESSORS_ONLN)
   - if [ "$CHECK_AUTOCONF" = "yes" -a "$CC" = "gcc" ]; then make -C src autoconf; fi
-  - if [ "x$SHADOWOPT" != x ]; then make -C src shadow; fi && (cd ${SRCDIR} && ./configure --with-features=$FEATURES $CONFOPT --enable-fail-if-missing && make -j$NPROC)
-  - ${SRCDIR}/vim --version
-  - make $SHADOWOPT unittests scripttests
+  - if [ "x$SHADOWOPT" != x ]; then make -C src shadow; fi
+  - if [ "x$BUILD" = "yes" ]; (cd ${SRCDIR} && ./configure --with-features=$FEATURES $CONFOPT --enable-fail-if-missing && make -j$NPROC); fi
+  - if [ "x$BUILD" = "yes" ]; ${SRCDIR}/vim --version; fi
+  - make $SHADOWOPT $TEST
 
 after_success:
   - if [ x"$COVERAGE" = "xyes" ]; then ~/.local/bin/coveralls -b $SRCDIR -x .xs -e ${SRCDIR}/xxd -e ${SRCDIR}/if_perl.c --encodings utf-8 latin-1 EUC-KR; fi