diff --git a/test/cases/io-barred-pprint/barred-input-headerless/cmd b/test/cases/io-barred-pprint/barred-input-headerless/cmd
index 41ebbe6712..de4ebd0d89 100644
--- a/test/cases/io-barred-pprint/barred-input-headerless/cmd
+++ b/test/cases/io-barred-pprint/barred-input-headerless/cmd
@@ -1 +1 @@
-mlr --hi --i pprint --barred-input -o json test/input/abixy.tbl
+mlr --hi -i pprint --barred-input -o json cat test/input/abixy.tbl
diff --git a/test/cases/io-barred-pprint/barred-input-headerless/experr b/test/cases/io-barred-pprint/barred-input-headerless/experr
index 87bf02e26b..e69de29bb2 100644
--- a/test/cases/io-barred-pprint/barred-input-headerless/experr
+++ b/test/cases/io-barred-pprint/barred-input-headerless/experr
@@ -1,2 +0,0 @@
-mlr: option "--i" not recognized.
-Please run "mlr --help" for usage information.
diff --git a/test/cases/io-barred-pprint/barred-input-headerless/expout b/test/cases/io-barred-pprint/barred-input-headerless/expout
index e69de29bb2..e08b56a901 100644
--- a/test/cases/io-barred-pprint/barred-input-headerless/expout
+++ b/test/cases/io-barred-pprint/barred-input-headerless/expout
@@ -0,0 +1,79 @@
+[
+{
+  "1": "a",
+  "2": "b",
+  "3": "i",
+  "4": "x",
+  "5": "y"
+},
+{
+  "1": "pan",
+  "2": "pan",
+  "3": 1,
+  "4": 0.34679014,
+  "5": 0.72680286
+},
+{
+  "1": "eks",
+  "2": "pan",
+  "3": 2,
+  "4": 0.75867996,
+  "5": 0.52215111
+},
+{
+  "1": "wye",
+  "2": "wye",
+  "3": 3,
+  "4": 0.20460331,
+  "5": 0.33831853
+},
+{
+  "1": "eks",
+  "2": "wye",
+  "3": 4,
+  "4": 0.38139939,
+  "5": 0.13418874
+},
+{
+  "1": "wye",
+  "2": "pan",
+  "3": 5,
+  "4": 0.57328892,
+  "5": 0.86362447
+},
+{
+  "1": "zee",
+  "2": "pan",
+  "3": 6,
+  "4": 0.52712616,
+  "5": 0.49322129
+},
+{
+  "1": "eks",
+  "2": "zee",
+  "3": 7,
+  "4": 0.61178406,
+  "5": 0.18788492
+},
+{
+  "1": "zee",
+  "2": "wye",
+  "3": 8,
+  "4": 0.59855401,
+  "5": 0.97618139
+},
+{
+  "1": "hat",
+  "2": "wye",
+  "3": 9,
+  "4": 0.03144188,
+  "5": 0.74955076
+},
+{
+  "1": "pan",
+  "2": "wye",
+  "3": 10,
+  "4": 0.50262601,
+  "5": 0.95261836
+}
+]
diff --git a/test/cases/io-barred-pprint/barred-input-headerless/should-fail b/test/cases/io-barred-pprint/barred-input-headerless/should-fail
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/test/cases/io-barred-pprint/barred-input/cmd b/test/cases/io-barred-pprint/barred-input/cmd
index f841265717..4c6742df63 100644
--- a/test/cases/io-barred-pprint/barred-input/cmd
+++ b/test/cases/io-barred-pprint/barred-input/cmd
@@ -1 +1 @@
-mlr --i pprint --barred-input -o json test/input/abixy.tbl
+mlr -i pprint --barred-input -o json cat test/input/abixy.tbl
diff --git a/test/cases/io-barred-pprint/barred-input/experr b/test/cases/io-barred-pprint/barred-input/experr
index 87bf02e26b..e69de29bb2 100644
--- a/test/cases/io-barred-pprint/barred-input/experr
+++ b/test/cases/io-barred-pprint/barred-input/experr
@@ -1,2 +0,0 @@
-mlr: option "--i" not recognized.
-Please run "mlr --help" for usage information.
diff --git a/test/cases/io-barred-pprint/barred-input/expout b/test/cases/io-barred-pprint/barred-input/expout
index e69de29bb2..48da252107 100644
--- a/test/cases/io-barred-pprint/barred-input/expout
+++ b/test/cases/io-barred-pprint/barred-input/expout
@@ -0,0 +1,72 @@
+[
+{
+  "a": "pan",
+  "b": "pan",
+  "i": 1,
+  "x": 0.34679014,
+  "y": 0.72680286
+},
+{
+  "a": "eks",
+  "b": "pan",
+  "i": 2,
+  "x": 0.75867996,
+  "y": 0.52215111
+},
+{
+  "a": "wye",
+  "b": "wye",
+  "i": 3,
+  "x": 0.20460331,
+  "y": 0.33831853
+},
+{
+  "a": "eks",
+  "b": "wye",
+  "i": 4,
+  "x": 0.38139939,
+  "y": 0.13418874
+},
+{
+  "a": "wye",
+  "b": "pan",
+  "i": 5,
+  "x": 0.57328892,
+  "y": 0.86362447
+},
+{
+  "a": "zee",
+  "b": "pan",
+  "i": 6,
+  "x": 0.52712616,
+  "y": 0.49322129
+},
+{
+  "a": "eks",
+  "b": "zee",
+  "i": 7,
+  "x": 0.61178406,
+  "y": 0.18788492
+},
+{
+  "a": "zee",
+  "b": "wye",
+  "i": 8,
+  "x": 0.59855401,
+  "y": 0.97618139
+},
+{
+  "a": "hat",
+  "b": "wye",
+  "i": 9,
+  "x": 0.03144188,
+  "y": 0.74955076
+},
+{
+  "a": "pan",
+  "b": "wye",
+  "i": 10,
+  "x": 0.50262601,
+  "y": 0.95261836
+}
+]
diff --git a/test/cases/io-barred-pprint/barred-input/should-fail b/test/cases/io-barred-pprint/barred-input/should-fail
deleted file mode 100644
index e69de29bb2..0000000000