diff --git a/.travis.yml b/.travis.yml
index 68caa376..812cfd9b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,14 @@ os:
   - linux
   - osx
 language: c
+env:
+  # These are supposed to match ALL in makefile.
+  # Each job builds 15 simulators.
+  - SIM="pdp1 pdp4 pdp6 pdp7 pdp8 pdp9 pdp10 pdp10-ka pdp10-ki pdp11 pdp15 vax microvax3900 microvax1 rtvax1000"
+  - SIM="microvax2 vax730 vax750 vax780 vax8200 vax8600 microvax2000 infoserver100 infoserver150vxt microvax3100 microvax3100e vaxstation3100m30 vaxstation3100m38 vaxstation3100m76 vaxstation4000m60"
+  - SIM="microvax3100m80 vaxstation4000vlc infoserver1000 nova eclipse hp2100 hp3000 i1401 i1620 s3 altair altairz80 gri i7094 ibm1130"
+  - SIM="id16 id32 sds lgp h316 cdc1700 swtp6800mp-a swtp6800mp-a2 tx-0 ssem b5500 isys8010 isys8020 isys8030 isys8024"
+  - SIM="imds-225 scelbi 3b2 i701 i704 i7010 i7070 i7080 i7090 sigma uc15"
 sudo: required
 install: sh -ex .travis/deps.sh
-script: make all
+script: make $SIM