diff --git a/interp/tests/runt.toml b/interp/tests/runt.toml
index 64eeac10c..b2bf97f7c 100644
--- a/interp/tests/runt.toml
+++ b/interp/tests/runt.toml
@@ -16,7 +16,7 @@ expect_dir = "unit"
 name = "multi-comp"
 paths = ["multi-comp/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s cider.flags="--dump-registers" \
          {}
@@ -37,7 +37,7 @@ name = "complex"
 paths = ["complex/*.futil"]
 
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s cider.flags="--dump-registers" \
          {}
@@ -49,7 +49,7 @@ expect_dir = "complex"
 name = "primitives"
 paths = ["primitives/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s calyx.args="--log off" \
          -s cider.flags="--dump-registers" \
@@ -71,7 +71,7 @@ expect_dir = "par-to-seq"
 name = "control"
 paths = ["control/*.futil", "control/iteration/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s cider.flags="--dump-registers" \
          {}
@@ -83,7 +83,7 @@ expect_dir = "control"
 name = "invoke"
 paths = ["control/invoke/*.futil"]
 cmd = """
-fud2 {} --from calyx --to jq --through cider -s sim.data={}.data -s calyx.args="--log off"
+fud2 {} --from calyx --to dat --through cider -s sim.data={}.data -s calyx.args="--log off"
 """
 timeout = 10
 
@@ -91,7 +91,7 @@ timeout = 10
 name = "invoke compiled"
 paths = ["control/invoke/*.futil"]
 cmd = """
-fud2 {} --from calyx --to jq --through cider \
+fud2 {} --from calyx --to dat --through cider \
  -s cider.calyx-passes=" -p compile-invoke" \
  -s sim.data={}.data -s calyx.args="--log off"
 """
@@ -118,7 +118,7 @@ expect_dir = "tests/lowered/"
 name = "correctness dynamic"
 paths = ["../../tests/correctness/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
@@ -136,7 +136,7 @@ cmd = """
 name = "correctness lowered"
 paths = ["../../tests/correctness/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
@@ -161,7 +161,7 @@ fud2 --from calyx --to dat \
 name = "correctness ref cells"
 paths = ["../../tests/correctness/ref-cells/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
@@ -172,7 +172,7 @@ fud2 --from calyx --to jq \
 name = "correctness ref cells compiled"
 paths = ["../../tests/correctness/ref-cells/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
@@ -188,7 +188,7 @@ paths = [
   "../../tests/correctness/numeric-types/fixed-point/*.futil",
 ]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
@@ -200,7 +200,7 @@ fud2 --from calyx --to jq \
 name = "[frontend] tcam testing"
 paths = ["../../tests/correctness/tcam/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
       --through cider \
       -s calyx.args="--log off" \
       -s sim.data={}.data \
@@ -211,7 +211,7 @@ fud2 --from calyx --to jq \
 name = "benchmark misc"
 paths = ["benchmarks/*.futil"]
 cmd = """
-fud2 --from calyx --to jq \
+fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
@@ -222,7 +222,7 @@ fud2 --from calyx --to jq \
 name = "benchmark polybench"
 paths = ["benchmarks/polybench/*.fuse"]
 cmd = """
-fud2 --from dahlia --to jq \
+fud2 --from dahlia --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \