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-rwxr-xr-xtest/hdiff-roundtrip.test8
1 files changed, 6 insertions, 2 deletions
diff --git a/test/hdiff-roundtrip.test b/test/hdiff-roundtrip.test
index dbe74701..3a27a955 100755
--- a/test/hdiff-roundtrip.test
+++ b/test/hdiff-roundtrip.test
@@ -2,5 +2,9 @@
 # This script tests: hdifftopam pamtohdiff
 # Also requires: 
 
-${PBM_TESTPREFIX}pamtohdiff testimg.ppm | \
-  ${PBM_TESTPREFIX}hdifftopam -pnm | cksum
\ No newline at end of file
+  alias hdifftopam="${PBM_TESTPREFIX}hdifftopam"
+  alias pamtohdiff="${PBM_TESTPREFIX}pamtohdiff"
+  shopt -s expand_aliases
+
+pamtohdiff testimg.ppm | \
+  hdifftopam -pnm | cksum