diff --git a/.github/workflows/docker-dist-tests.yml b/.github/workflows/docker-dist-tests.yml
index 5ae2e30a..ae1e5e9e 100644
--- a/.github/workflows/docker-dist-tests.yml
+++ b/.github/workflows/docker-dist-tests.yml
@@ -24,7 +24,7 @@ jobs:
     name: Build and Push
     uses: ./.github/workflows/docker-reusable.yml
     with:
-      nimflags: '-d:disableMarchNative -d:codex_enable_api_debug_peers=true -d:codex_enable_proof_failures=true -d:codex_use_hardhat=false -d:codex_enable_log_counter=true'
+      nimflags: '-d:disableMarchNative -d:codex_enable_api_debug_peers=true -d:codex_enable_proof_failures=true -d:codex_enable_log_counter=true'
       nat_ip_auto: true
       tag_latest: ${{ github.ref_name == github.event.repository.default_branch || startsWith(github.ref, 'refs/tags/') }}
       tag_suffix: dist-tests
diff --git a/build.nims b/build.nims
index 11eec387..33d7b623 100644
--- a/build.nims
+++ b/build.nims
@@ -25,13 +25,13 @@ task codex, "build codex binary":
   buildBinary "codex", params = "-d:chronicles_runtime_filtering -d:chronicles_log_level=TRACE"
 
 task testCodex, "Build & run Codex tests":
-  test "testCodex", params = "-d:codex_enable_proof_failures=true -d:codex_use_hardhat=true"
+  test "testCodex", params = "-d:codex_enable_proof_failures=true"
 
 task testContracts, "Build & run Codex Contract tests":
   test "testContracts"
 
 task testIntegration, "Run integration tests":
-  buildBinary "codex", params = "-d:chronicles_runtime_filtering -d:chronicles_log_level=TRACE -d:codex_enable_proof_failures=true -d:codex_use_hardhat=true"
+  buildBinary "codex", params = "-d:chronicles_runtime_filtering -d:chronicles_log_level=TRACE -d:codex_enable_proof_failures=true"
   test "testIntegration"
 
 task build, "build codex binary":
@@ -75,7 +75,7 @@ task coverage, "generates code coverage report":
     if f.endswith(".nim"): nimSrcs.add " " & f.absolutePath.quoteShell()
 
   echo "======== Running Tests ======== "
-  test "coverage", srcDir = "tests/", params = " --nimcache:nimcache/coverage -d:release -d:codex_enable_proof_failures=true -d:codex_use_hardhat=true"
+  test "coverage", srcDir = "tests/", params = " --nimcache:nimcache/coverage -d:release -d:codex_enable_proof_failures=true"
   exec("rm nimcache/coverage/*.c")
   rmDir("coverage"); mkDir("coverage")
   echo " ======== Running LCOV ======== "
diff --git a/codex/conf.nim b/codex/conf.nim
index 7bf176da..8ec99041 100644
--- a/codex/conf.nim
+++ b/codex/conf.nim
@@ -59,7 +59,6 @@ proc defaultDataDir*(): string =
 const
   codex_enable_api_debug_peers* {.booldefine.} = false
   codex_enable_proof_failures* {.booldefine.} = false
-  codex_use_hardhat* {.booldefine.} = false
   codex_enable_log_counter* {.booldefine.} = false
 
   DefaultDataDir* = defaultDataDir()