diff --git a/code/ZAS/Atom.dm b/code/ZAS/Atom.dm
index 700eded6d85..b395c4551e2 100644
--- a/code/ZAS/Atom.dm
+++ b/code/ZAS/Atom.dm
@@ -101,7 +101,7 @@ turf/c_airblock(turf/other)
 			if(ATMOS_PASS_NO)
 				return BLOCKED
 			if(ATMOS_PASS_DENSITY)
-				if(density)
+				if(M.density)
 					return BLOCKED
 			if(ATMOS_PASS_PROC)
 				result |= M.c_airblock(other)
diff --git a/tools/travis/compile_and_run.sh b/tools/travis/compile_and_run.sh
index b4f9e403b02..fa3c382943e 100644
--- a/tools/travis/compile_and_run.sh
+++ b/tools/travis/compile_and_run.sh
@@ -33,6 +33,6 @@ fi
 if [ $RUN -eq 1 ];
 then
   DreamDaemon $BASENAME.dmb -invisible -trusted -core 2>&1 | tee log.txt;
-  grep "All Unit Tests Passed" log.txt
-  grep "Caught 0 Runtimes" log.txt
+  grep "All Unit Tests Passed" log.txt || exit 1
+  grep "Caught 0 Runtimes" log.txt || exit 1
 fi