diff --git a/tests/peek/ndnpoke.t.cpp b/tests/peek/ndnpoke.t.cpp
index 09a562c..617b516 100644
--- a/tests/peek/ndnpoke.t.cpp
+++ b/tests/peek/ndnpoke.t.cpp
@@ -26,7 +26,8 @@
 #include "tools/peek/ndnpoke/ndnpoke.hpp"
 
 #include "tests/test-common.hpp"
-#include "tests/identity-management-fixture.hpp"
+#include "tests/io-fixture.hpp"
+#include "tests/key-chain-fixture.hpp"
 
 #include <ndn-cxx/util/dummy-client-face.hpp>
 
@@ -37,7 +38,7 @@
 using namespace ndn::tests;
 
 template<bool WANT_PREFIX_REG_REPLY = true>
-class NdnPokeFixture : public IdentityManagementTimeFixture
+class NdnPokeFixture : public IoFixture, public KeyChainFixture
 {
 protected:
   NdnPokeFixture()
@@ -60,8 +61,7 @@
   }
 
 protected:
-  boost::asio::io_service io;
-  ndn::util::DummyClientFace face{io, m_keyChain, {true, WANT_PREFIX_REG_REPLY}};
+  ndn::util::DummyClientFace face{m_io, m_keyChain, {true, WANT_PREFIX_REG_REPLY}};
   std::stringstream payload{"Hello, world!\n"};
   unique_ptr<NdnPoke> poke;
 };
@@ -74,14 +74,14 @@
   initialize();
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   // Check for prefix registration
   BOOST_REQUIRE_EQUAL(face.sentInterests.size(), 1);
   BOOST_CHECK_EQUAL(face.sentInterests.front().getName().getPrefix(4), "/localhost/nfd/rib/register");
 
   face.receive(*makeInterest("/poke/test"));
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::DATA_SENT);
   BOOST_REQUIRE_EQUAL(face.sentData.size(), 1);
@@ -102,16 +102,16 @@
   initialize();
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   face.receive(*makeInterest("/poke/test/foo"));
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::UNKNOWN);
   BOOST_CHECK_EQUAL(face.sentData.size(), 0);
 
   face.receive(*makeInterest("/poke/test"));
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::DATA_SENT);
   BOOST_REQUIRE_EQUAL(face.sentData.size(), 1);
@@ -125,10 +125,10 @@
   initialize(options);
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   face.receive(*makeInterest("/poke/test"));
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::DATA_SENT);
   BOOST_REQUIRE_EQUAL(face.sentData.size(), 1);
@@ -146,10 +146,10 @@
   initialize(options);
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   face.receive(*makeInterest(options.name));
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::DATA_SENT);
   BOOST_REQUIRE_EQUAL(face.sentData.size(), 1);
@@ -167,10 +167,10 @@
   initialize(options);
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   face.receive(*makeInterest("/poke/test"));
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::DATA_SENT);
   BOOST_REQUIRE_EQUAL(face.sentData.size(), 1);
@@ -187,7 +187,7 @@
   initialize(options);
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::DATA_SENT);
   BOOST_REQUIRE_EQUAL(face.sentData.size(), 1);
@@ -204,13 +204,13 @@
   initialize(options);
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   // Check for prefix registration
   BOOST_REQUIRE_EQUAL(face.sentInterests.size(), 1);
   BOOST_CHECK_EQUAL(face.sentInterests.front().getName().getPrefix(4), "/localhost/nfd/rib/register");
 
-  this->advanceClocks(io, 1_s, 4);
+  this->advanceClocks(1_s, 4);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::TIMEOUT);
   BOOST_CHECK_EQUAL(face.sentData.size(), 0);
@@ -225,13 +225,13 @@
   initialize();
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   // Check for prefix registration
   BOOST_REQUIRE_EQUAL(face.sentInterests.size(), 1);
   BOOST_CHECK_EQUAL(face.sentInterests.front().getName().getPrefix(4), "/localhost/nfd/rib/register");
 
-  this->advanceClocks(io, 1_s, 10);
+  this->advanceClocks(1_s, 10);
 
   BOOST_CHECK(poke->getResult() == NdnPoke::Result::PREFIX_REG_FAIL);
   BOOST_CHECK_EQUAL(face.sentData.size(), 0);
@@ -243,7 +243,7 @@
   initialize();
 
   poke->start();
-  this->advanceClocks(io, 1_ms, 10);
+  this->advanceClocks(1_ms, 10);
 
   face.receive(*makeInterest("/poke/test"));
   BOOST_CHECK_THROW(face.processEvents(), Face::OversizedPacketError);