diff --git a/.gitignore b/.gitignore
index fbea0f6..15d08ae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ tests/test_nested_cmd
 tests/test_help
 tests/test_argument
 tests/test_parsecmdarg
+tests/test_case_opt
diff --git a/confutils.nim b/confutils.nim
index dc84ea2..70e25b1 100644
--- a/confutils.nim
+++ b/confutils.nim
@@ -195,7 +195,7 @@ func helpOptDesc(appInfo: HelpAppInfo): string =
 
 func isCliSwitch(opt: OptInfo): bool =
   opt.kind == CliSwitch or
-  (opt.kind == Discriminator and opt.isCommand == false)
+  (opt.kind == Discriminator and not opt.isCommand)
 
 func isOpt(opt: OptInfo, excl: set[OptFlag]): bool =
   opt.isCliSwitch and excl * opt.flags == {}
@@ -1280,6 +1280,8 @@ proc loadImpl[C, SecondarySources](
       processHelpAndVersionOptions(key, val)
 
       var opt = findOpt(activeCmds, key)
+      #for x in activeCmds:
+      #  debugEcho repr x
       if opt == nil:
         # We didn't find the option.
         # Check if it's from the default command and activate it if necessary:
@@ -1294,7 +1296,14 @@ proc loadImpl[C, SecondarySources](
             discard
 
       if opt != nil:
-        result.applySetter(opt.idx, val)
+        if opt.kind == Discriminator and not opt.isCommand:
+          let subCmd = findCmd(opt.subCmds, val)
+          if subCmd == nil:
+            fail "Unrecognized value '" & val & "'" & " for option '" & key & "'"
+          result.applySetter(opt.idx, if subCmd.desc.len > 0: subCmd.desc else: subCmd.name)
+          activeCmds.add subCmd
+        else:
+          result.applySetter(opt.idx, val)
       elif not ignoreUnknown:
         fail "Unrecognized option '" & key & "'"
 
diff --git a/tests/test_all.nim b/tests/test_all.nim
index 23f13ea..48df0e9 100644
--- a/tests/test_all.nim
+++ b/tests/test_all.nim
@@ -9,6 +9,7 @@
 
 import
   test_argument,
+  test_case_opt,
   test_config_file,
   test_dispatch,
   test_duplicates,
diff --git a/tests/test_case_opt.nim b/tests/test_case_opt.nim
new file mode 100644
index 0000000..5f45c29
--- /dev/null
+++ b/tests/test_case_opt.nim
@@ -0,0 +1,162 @@
+# confutils
+# Copyright (c) 2018-2026 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+import unittest2, ../confutils
+
+#type
+#  StartupCommand* = enum
+#    noCommand
+#    cmdSlotProcessing
+#    cmdBlockProcessing
+#
+#  BlockProcessingCat* = enum
+#    catBlockHeader
+#    catAttestations
+#    catDeposits
+#
+#  ScenarioConf* = object
+#    preState* {.
+#      desc: "The name of your pre-state (without .ssz)"
+#      name: "pre"
+#      abbr: "p"
+#      defaultValue: "pre".}: string
+#    case cmd*{.
+#      command
+#      defaultValue: noCommand }: StartupCommand
+#    of noCommand:
+#      discard
+#    of cmdSlotProcessing:
+#      numSlots* {.
+#        desc: "The number of slots the pre-state will be advanced by"
+#        name: "num-slots"
+#        abbr: "s"
+#        defaultValue: 1.}: uint64
+#    of cmdBlockProcessing:
+#      case blockProcessingCat* {.
+#        desc: "block transitions"
+#        #name: "process-blocks" # Comment this to make it work
+#        implicitlySelectable
+#        required .}: BlockProcessingCat
+#      of catBlockHeader:
+#        discard
+#      of catAttestations:
+#        attestation*{.
+#          desc: "Attestation filename (without .ssz)"
+#          name: "attestation"
+#          defaultValue: "attestation default".}: string
+#      of catDeposits:
+#        discard
+#
+#suite "test case option":
+#  test "no command":
+#    let conf = ScenarioConf.load(cmdLine = @[])
+#    check:
+#      conf.cmd == StartupCommand.noCommand
+#      conf.preState == "pre"
+#
+#  test "case option has default value":
+#    let conf = ScenarioConf.load(cmdLine = @[
+#      "cmdBlockProcessing",
+#      "--blockProcessingCat=catAttestations",
+#      "--attestation=attestation"
+#    ])
+#    check:
+#      conf.cmd == StartupCommand.cmdBlockProcessing
+#      conf.blockProcessingCat == BlockProcessingCat.catAttestations
+#      conf.attestation == "attestation"
+
+type
+  StartupCommand* = enum
+    noCommand
+    cmdSlotProcessing
+    cmdBlockProcessing
+
+  BlockProcessingCat* = enum
+    catBlockHeader
+    catAttestations
+    catDeposits
+
+  TestConf = object
+    preState {.
+      desc: "The name of your pre-state (without .ssz)"
+      name: "pre"
+      abbr: "p"
+      defaultValue: "pre".}: string
+    case blockProcessingCat {.
+      desc: "block transitions"
+      #name: "process-blocks" # Comment this to make it work
+      implicitlySelectable
+      required .}: BlockProcessingCat
+    of catBlockHeader:
+      discard
+    of catAttestations:
+      attestation{.
+        desc: "Attestation filename (without .ssz)"
+        name: "attestation"
+        defaultValue: "attestation default".}: string
+    of catDeposits:
+      discard
+    
+    case block2 {.
+      desc: "block transitions"
+      #name: "process-blocks" # Comment this to make it work
+      implicitlySelectable
+      required .}: StartupCommand
+    of noCommand:
+      discard
+    of cmdSlotProcessing:
+      attestation2 {.
+        desc: "Attestation filename (without .ssz)"
+        name: "attestation2"
+        defaultValue: "attestation default".}: string
+    of cmdBlockProcessing:
+      discard
+
+suite "test case option":
+#  test "case option has default value":
+#    let conf = TestConf.load(cmdLine = @[
+#      "--blockProcessingCat=catAttestations",
+#      #"--attestation=attestation"
+#    ])
+#    check:
+#      conf.blockProcessingCat == BlockProcessingCat.catAttestations
+#      conf.attestation == "attestation default"
+#
+#  test "case option set value":
+#    let conf = TestConf.load(cmdLine = @[
+#      "--blockProcessingCat=catAttestations",
+#      "--attestation=foobar"
+#    ])
+#    check:
+#      conf.blockProcessingCat == BlockProcessingCat.catAttestations
+#      conf.attestation == "foobar"
+#
+#  test "case option set value":
+#    let conf = TestConf.load(cmdLine = @[
+#      "--blockProcessingCat=catAttestations",
+#      "--attestation=foobar",
+#      "--pre=foo"
+#    ])
+#    check:
+#      conf.blockProcessingCat == BlockProcessingCat.catAttestations
+#      conf.attestation == "foobar"
+#      conf.preState == "foo"
+
+  test "case option set value":
+    let conf = TestConf.load(cmdLine = @[
+      "--blockProcessingCat=catAttestations",
+      "--attestation=foobar",
+      "--block2=cmdSlotProcessing",
+      "--attestation2=bar"
+    ])
+    check:
+      conf.blockProcessingCat == BlockProcessingCat.catAttestations
+      conf.block2 == StartupCommand.cmdSlotProcessing
+      conf.attestation == "foobar"
+      conf.attestation2 == "bar"