I think this will work...
diff --git a/.travis.yml b/.travis.yml
index d64fa8c..2f96f8e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,4 +11,4 @@
   - cat $DOCKERFILE | sed -e 's/SOURCE_IMAGE_NAME/$SRC_IMGNAME/g' > Dockerfile ; docker build -t $IMGNAME .
 
 script:
-  - docker run -it --rm $IMGNAME /build_test_scripts/decode.sh
+  - docker run -it --rm $IMGNAME /src/build_test_scripts/decode.sh
diff --git a/Dockerfile b/Dockerfile
index e69de29..9e7e728 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -0,0 +1 @@
+# This file is overwritten by the .travis.yml script as part of automated builds.
diff --git a/build_test_scripts/decode.sh b/build_test_scripts/decode.sh
index 78c0293..e061736 100644
--- a/build_test_scripts/decode.sh
+++ b/build_test_scripts/decode.sh
@@ -1,6 +1,5 @@
 #!/bin/bash
 export AP_DECODE=/usr/local/bin/airprobe_decode.py
-export CAPFILE=/test_data/vf_call6_a725_d174_g5_Kc1EF00BAB3BAC7002.cfile
-# We expect $CAPFILE to be defined.  If not, exit...
+export CAPFILE=/src/test_data/vf_call6_a725_d174_g5_Kc1EF00BAB3BAC7002.cfile
 
-/usr/bin/python $AP_DECODE -c $CAPFILE
+/usr/bin/python $AP_DECODE -c $CAPFILE -s $((100000000/174)) -a 725 -m BCCH -t 0