diff --git a/go/cases-to-do.txt b/go/cases-to-do.txt
index dad90a0e4..3a618b643 100644
--- a/go/cases-to-do.txt
+++ b/go/cases-to-do.txt
@@ -1,8 +1,6 @@
 ================================================================
 BUG:
 
-rrv ./reg-test/cases/case-c-cat.sh
-
 rrv ./reg-test/cases/case-c-altkv.sh
 rrv ./reg-test/cases/case-c-dsl-argpass-typedecl.sh
 rrv ./reg-test/cases/case-c-dsl-extended-typeof.sh
diff --git a/go/reg-test/cases/case-c-cat.sh b/go/reg-test/cases/case-cat.sh
similarity index 65%
rename from go/reg-test/cases/case-c-cat.sh
rename to go/reg-test/cases/case-cat.sh
index dc46d394e..ba5b72d13 100644
--- a/go/reg-test/cases/case-c-cat.sh
+++ b/go/reg-test/cases/case-cat.sh
@@ -1,5 +1,3 @@
-# Intended to be invoked by "." from reg-test/run
-
 run_mlr cat $indir/abixy
 run_mlr cat /dev/null
 
@@ -14,3 +12,8 @@ run_mlr cat -g a,b -N counter $indir/abixy-het
 
 echo a,b,c,d,e,f   | run_mlr cat
 echo a,b,c,d,e,f,g | run_mlr cat
+
+run_mlr --opprint cat           $indir/s.dkvp
+run_mlr --opprint cat -n        $indir/s.dkvp
+run_mlr --opprint cat -n -g a   $indir/s.dkvp
+run_mlr --opprint cat -n -g a,b $indir/s.dkvp
diff --git a/go/reg-test/cases/case-go-cat.sh b/go/reg-test/cases/case-go-cat.sh
deleted file mode 100644
index 04f274a02..000000000
--- a/go/reg-test/cases/case-go-cat.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-run_mlr --opprint cat           $indir/s.dkvp
-run_mlr --opprint cat -n        $indir/s.dkvp
-run_mlr --opprint cat -n -g a   $indir/s.dkvp
-run_mlr --opprint cat -n -g a,b $indir/s.dkvp
diff --git a/go/reg-test/expected/case-c-cat.sh.out b/go/reg-test/expected/case-cat.sh.out
similarity index 80%
rename from go/reg-test/expected/case-c-cat.sh.out
rename to go/reg-test/expected/case-cat.sh.out
index fcb080e63..1de117e38 100644
--- a/go/reg-test/expected/case-c-cat.sh.out
+++ b/go/reg-test/expected/case-cat.sh.out
@@ -91,3 +91,31 @@ mlr cat
 mlr cat
 1=a,2=b,3=c,4=d,5=e,6=f,7=g
 
+mlr --opprint cat ./reg-test/input/s.dkvp
+a   b   i x                   y
+pan pan 1 0.3467901443380824  0.7268028627434533
+eks pan 2 0.7586799647899636  0.5221511083334797
+wye wye 3 0.20460330576630303 0.33831852551664776
+eks wye 4 0.38139939387114097 0.13418874328430463
+
+mlr --opprint cat -n ./reg-test/input/s.dkvp
+n a   b   i x                   y
+1 pan pan 1 0.3467901443380824  0.7268028627434533
+2 eks pan 2 0.7586799647899636  0.5221511083334797
+3 wye wye 3 0.20460330576630303 0.33831852551664776
+4 eks wye 4 0.38139939387114097 0.13418874328430463
+
+mlr --opprint cat -n -g a ./reg-test/input/s.dkvp
+n a   b   i x                   y
+1 pan pan 1 0.3467901443380824  0.7268028627434533
+1 eks pan 2 0.7586799647899636  0.5221511083334797
+1 wye wye 3 0.20460330576630303 0.33831852551664776
+2 eks wye 4 0.38139939387114097 0.13418874328430463
+
+mlr --opprint cat -n -g a,b ./reg-test/input/s.dkvp
+n a   b   i x                   y
+1 pan pan 1 0.3467901443380824  0.7268028627434533
+1 eks pan 2 0.7586799647899636  0.5221511083334797
+1 wye wye 3 0.20460330576630303 0.33831852551664776
+1 eks wye 4 0.38139939387114097 0.13418874328430463
+
diff --git a/go/reg-test/expected/case-go-cat.sh.err b/go/reg-test/expected/case-go-cat.sh.err
deleted file mode 100644
index e69de29bb..000000000
diff --git a/go/reg-test/expected/case-go-cat.sh.out b/go/reg-test/expected/case-go-cat.sh.out
deleted file mode 100644
index 884a6cf50..000000000
--- a/go/reg-test/expected/case-go-cat.sh.out
+++ /dev/null
@@ -1,29 +0,0 @@
-
-mlr --opprint cat ./reg-test/input/s.dkvp
-a   b   i x                   y
-pan pan 1 0.3467901443380824  0.7268028627434533
-eks pan 2 0.7586799647899636  0.5221511083334797
-wye wye 3 0.20460330576630303 0.33831852551664776
-eks wye 4 0.38139939387114097 0.13418874328430463
-
-mlr --opprint cat -n ./reg-test/input/s.dkvp
-n a   b   i x                   y
-1 pan pan 1 0.3467901443380824  0.7268028627434533
-2 eks pan 2 0.7586799647899636  0.5221511083334797
-3 wye wye 3 0.20460330576630303 0.33831852551664776
-4 eks wye 4 0.38139939387114097 0.13418874328430463
-
-mlr --opprint cat -n -g a ./reg-test/input/s.dkvp
-n a   b   i x                   y
-1 pan pan 1 0.3467901443380824  0.7268028627434533
-1 eks pan 2 0.7586799647899636  0.5221511083334797
-1 wye wye 3 0.20460330576630303 0.33831852551664776
-2 eks wye 4 0.38139939387114097 0.13418874328430463
-
-mlr --opprint cat -n -g a,b ./reg-test/input/s.dkvp
-n a   b   i x                   y
-1 pan pan 1 0.3467901443380824  0.7268028627434533
-1 eks pan 2 0.7586799647899636  0.5221511083334797
-1 wye wye 3 0.20460330576630303 0.33831852551664776
-1 eks wye 4 0.38139939387114097 0.13418874328430463
-