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-rwxr-xr-xtest/pnminvert-roundtrip.test7
1 files changed, 5 insertions, 2 deletions
diff --git a/test/pnminvert-roundtrip.test b/test/pnminvert-roundtrip.test
index 8cdb6c25..eb3e2b35 100755
--- a/test/pnminvert-roundtrip.test
+++ b/test/pnminvert-roundtrip.test
@@ -2,5 +2,8 @@
 # This script tests: pnminvert
 # Also requires: 
 
-${PBM_TESTPREFIX}pnminvert testimg.ppm | ${PBM_TESTPREFIX}pnminvert | cksum
-${PBM_TESTPREFIX}pnminvert testgrid.pbm | ${PBM_TESTPREFIX}pnminvert | cksum
+  alias pnminvert="${PBM_TESTPREFIX}pnminvert"
+  shopt -s expand_aliases
+
+pnminvert testimg.ppm | pnminvert | cksum
+pnminvert testgrid.pbm | pnminvert | cksum