diff --git a/tests/integration/multinodes.nim b/tests/integration/multinodes.nim
index 1f2728ca..552e7c37 100644
--- a/tests/integration/multinodes.nim
+++ b/tests/integration/multinodes.nim
@@ -90,7 +90,7 @@ template multinodesuite*(suiteName: string, body: untyped) =
     #         .withEthProvider("ws://localhost:8545")
     #         .some,
     #     ...
-    var jsonRpcProviderUrl = "http://127.0.0.1:" & $HardhatPort
+    var jsonRpcProviderUrl = "ws://localhost:" & $HardhatPort
     var running {.inject, used.}: seq[RunningNode]
     var bootstrapNodes: seq[string]
     let starttime = now().format("yyyy-MM-dd'_'HH:mm:ss")
@@ -324,7 +324,11 @@ template multinodesuite*(suiteName: string, body: untyped) =
         except ProviderError as e:
           error "Failed to revert hardhat state during teardown", error = e.msg
 
-        await ethProvider.close()
+        # TODO: JsonRpcProvider.close should NOT raise any exceptions
+        try:
+          await ethProvider.close()
+        except CatchableError:
+          discard
 
       running = @[]
 
diff --git a/tests/integration/testcli.nim b/tests/integration/testcli.nim
index 4fd33378..f5dd3e62 100644
--- a/tests/integration/testcli.nim
+++ b/tests/integration/testcli.nim
@@ -74,7 +74,7 @@ asyncchecksuite "Command line interface":
     let node = await startCodex(
       @[
         "persistence",
-        "--eth-provider=" & "http://127.0.0.1:" & $HardhatPort,
+        "--eth-provider=" & "ws://localhost:" & $HardhatPort,
         "--eth-private-key=" & unsafeKeyFile,
       ]
     )
@@ -98,7 +98,7 @@ asyncchecksuite "Command line interface":
     let node = await startCodex(
       @[
         "persistence",
-        "--eth-provider=" & "http://127.0.0.1:" & $HardhatPort,
+        "--eth-provider=" & "ws://localhost:" & $HardhatPort,
         "prover",
         marketplaceArg,
         "--circom-r1cs=tests/circuits/fixtures/proof_main.r1cs",
@@ -111,7 +111,7 @@ asyncchecksuite "Command line interface":
     let node = await startCodex(
       @[
         "persistence",
-        "--eth-provider=" & "http://127.0.0.1:" & $HardhatPort,
+        "--eth-provider=" & "ws://localhost:" & $HardhatPort,
         "prover",
         marketplaceArg,
         "--circom-r1cs=tests/circuits/fixtures/proof_main.r1cs",