diff --git a/configure b/configure
index 37d48cca..30e9b8fd 100755
--- a/configure
+++ b/configure
@@ -636,12 +636,15 @@ ac_subst_vars='LTLIBOBJS
 LIBOBJS
 TRUST_ANCHOR_FILE
 EXTENSION_LDFLAGS
+CHECK_EV_PROG
 EXTENSION_LIBEV_EXT_LIBS
 EXTENSION_LIBEV_LIB
 have_libev
+CHECK_UV_PROG
 EXTENSION_LIBUV_EXT_LIBS
 EXTENSION_LIBUV_LIB
 have_libuv
+CHECK_EVENT_PROG
 EXTENSION_LIBEVENT_EXT_LIBS
 EXTENSION_LIBEVENT_LIB
 have_libevent
@@ -11173,6 +11176,7 @@ EXTENSION_LDFLAGS=$LDFLAGS
 have_libevent=1
 EXTENSION_LIBEVENT_LIB="libgetdns_ext_event.la"
 EXTENSION_LIBEVENT_EXT_LIBS=""
+CHECK_EVENT_PROG=""
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing event_loop" >&5
 $as_echo_n "checking for library containing event_loop... " >&6; }
 if ${ac_cv_search_event_loop+:} false; then :
@@ -11238,9 +11242,6 @@ _ACEOF
 fi
 done
 
-
-$as_echo "#define HAVE_LIBEVENT 1" >>confdefs.h
-
     for ac_header in event2/event.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "event2/event.h" "ac_cv_header_event2_event_h" "$ac_includes_default
@@ -11255,6 +11256,7 @@ fi
 done
 
     EXTENSION_LIBEVENT_EXT_LIBS="-l$ac_lib"
+    CHECK_EVENT_PROG=check_getdns_event
 else
   have_libevent=0
     EXTENSION_LIBEVENT_LIB=""
@@ -11265,10 +11267,12 @@ fi
 
 
 
+
 # libuv extension
 have_libuv=1
 EXTENSION_LIBUV_LIB="libgetdns_ext_uv.la"
 EXTENSION_LIBUV_EXT_LIBS=""
+CHECK_UV_PROG=""
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing uv_run" >&5
 $as_echo_n "checking for library containing uv_run... " >&6; }
 if ${ac_cv_search_uv_run+:} false; then :
@@ -11322,10 +11326,8 @@ $as_echo "$ac_cv_search_uv_run" >&6; }
 ac_res=$ac_cv_search_uv_run
 if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-$as_echo "#define HAVE_LIBUV 1" >>confdefs.h
-
-    EXTENSION_LIBUV_EXT_LIBS="-l$ac_lib"
+  EXTENSION_LIBUV_EXT_LIBS="-l$ac_lib"
+    CHECK_UV_PROG=check_getdns_uv
 else
   have_libuv=0
     EXTENSION_LIBUV_LIB=""
@@ -11336,10 +11338,12 @@ fi
 
 
 
+
 # libev extension
 have_libev=1
 EXTENSION_LIBEV_LIB="libgetdns_ext_ev.la"
 EXTENSION_LIBEV_EXT_LIBS=""
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing ev_run" >&5
 $as_echo_n "checking for library containing ev_run... " >&6; }
 if ${ac_cv_search_ev_run+:} false; then :
@@ -11393,10 +11397,8 @@ $as_echo "$ac_cv_search_ev_run" >&6; }
 ac_res=$ac_cv_search_ev_run
 if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-$as_echo "#define HAVE_LIBEV 1" >>confdefs.h
-
-    EXTENSION_LIBEV_EXT_LIBS="-l$ac_lib"
+  EXTENSION_LIBEV_EXT_LIBS="-l$ac_lib"
+    CHECK_EV_PROG=check_getdns_ev
 else
   have_libev=0
     EXTENSION_LIBEV_LIB=""
@@ -11409,6 +11411,7 @@ fi
 
 
 
+
 LIBS=$getdns_LIBS
 LDFLAGS=$getdns_LDFLAGS
 
diff --git a/configure.ac b/configure.ac
index 3f8f9c76..de30a8c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -199,48 +199,54 @@ EXTENSION_LDFLAGS=$LDFLAGS
 have_libevent=1
 EXTENSION_LIBEVENT_LIB="libgetdns_ext_event.la"
 EXTENSION_LIBEVENT_EXT_LIBS=""
+CHECK_EVENT_PROG=""
 AC_SEARCH_LIBS([event_loop],
     [event_core event],
     [AC_CHECK_FUNCS([event_base_new event_base_free])]
-    [AC_DEFINE([HAVE_LIBEVENT], [1], [Define to 1 to enable the libevent extension])]
     [AC_CHECK_HEADERS([event2/event.h],,, [AC_INCLUDES_DEFAULT])]
-    [EXTENSION_LIBEVENT_EXT_LIBS="-l$ac_lib"],
+    [EXTENSION_LIBEVENT_EXT_LIBS="-l$ac_lib"]
+    [CHECK_EVENT_PROG=check_getdns_event],
     [have_libevent=0]
     [EXTENSION_LIBEVENT_LIB=""])
 
 AC_SUBST(have_libevent)
 AC_SUBST(EXTENSION_LIBEVENT_LIB)
 AC_SUBST(EXTENSION_LIBEVENT_EXT_LIBS)
+AC_SUBST(CHECK_EVENT_PROG)
 
 # libuv extension
 have_libuv=1
 EXTENSION_LIBUV_LIB="libgetdns_ext_uv.la"
 EXTENSION_LIBUV_EXT_LIBS=""
+CHECK_UV_PROG=""
 AC_SEARCH_LIBS([uv_run],
     [uv],
-    [AC_DEFINE([HAVE_LIBUV], [1], [Define to 1 to enable the libuv extension])]
-    [EXTENSION_LIBUV_EXT_LIBS="-l$ac_lib"],
+    [EXTENSION_LIBUV_EXT_LIBS="-l$ac_lib"]
+    [CHECK_UV_PROG=check_getdns_uv],
     [have_libuv=0]
     [EXTENSION_LIBUV_LIB=""])
 
 AC_SUBST(have_libuv)
 AC_SUBST(EXTENSION_LIBUV_LIB)
 AC_SUBST(EXTENSION_LIBUV_EXT_LIBS)
+AC_SUBST(CHECK_UV_PROG)
 
 # libev extension
 have_libev=1
 EXTENSION_LIBEV_LIB="libgetdns_ext_ev.la"
 EXTENSION_LIBEV_EXT_LIBS=""
+
 AC_SEARCH_LIBS([ev_run],
     [ev],
-    [AC_DEFINE([HAVE_LIBEV], [1], [Define to 1 to enable the libev extension])]
-    [EXTENSION_LIBEV_EXT_LIBS="-l$ac_lib"],
+    [EXTENSION_LIBEV_EXT_LIBS="-l$ac_lib"]
+    [CHECK_EV_PROG=check_getdns_ev],
     [have_libev=0]
     [EXTENSION_LIBEV_LIB=""])
 
 AC_SUBST(have_libev)
 AC_SUBST(EXTENSION_LIBEV_LIB)
 AC_SUBST(EXTENSION_LIBEV_EXT_LIBS)
+AC_SUBST(CHECK_EV_PROG)
 
 AC_SUBST(EXTENSION_LDFLAGS)
 
diff --git a/src/config.h.in b/src/config.h.in
index cd6a458f..a37faddc 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -15,12 +15,6 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
-/* Define to 1 to enable the libev extension */
-#undef HAVE_LIBEV
-
-/* Define to 1 to enable the libevent extension */
-#undef HAVE_LIBEVENT
-
 /* Define to 1 if you have the `idn' library (-lidn). */
 #undef HAVE_LIBIDN
 
@@ -30,9 +24,6 @@
 /* Define to 1 if you have the `unbound' library (-lunbound). */
 #undef HAVE_LIBUNBOUND
 
-/* Define to 1 to enable the libuv extension */
-#undef HAVE_LIBUV
-
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
diff --git a/src/test/Makefile.in b/src/test/Makefile.in
index 8c86eca2..fe209368 100644
--- a/src/test/Makefile.in
+++ b/src/test/Makefile.in
@@ -39,11 +39,23 @@ LIBTOOL = @libtool@
 srcdir = @srcdir@
 VPATH = @srcdir@
 
+have_libevent = @have_libevent@
+have_libuv = @have_libuv@
+have_libev = @have_libev@
+
+EXTENSION_LIBEVENT_EXT_LIBS=@EXTENSION_LIBEVENT_EXT_LIBS@
+EXTENSION_LIBUV_EXT_LIBS=@EXTENSION_LIBUV_EXT_LIBS@
+EXTENSION_LIBEV_EXT_LIBS=@EXTENSION_LIBEV_EXT_LIBS@
+
+CHECK_UV_PROG=@CHECK_UV_PROG@
+CHECK_EVENT_PROG=@CHECK_EVENT_PROG@
+CHECK_EV_PROG=@CHECK_EV_PROG@
+
 CC=@CC@
 CFLAGS=@CFLAGS@ -Wall -I$(srcdir)/ -I$(srcdir)/../ -I/usr/local/include -std=c99 $(cflags)
 LDFLAGS=@LDFLAGS@ -L. -L.. -L$(srcdir)/../ -L/usr/local/lib
 LDLIBS=-lgetdns @LIBS@ -lcheck
-PROGRAMS=tests_dict tests_list tests_stub_async tests_stub_sync check_getdns tests_dnssec
+PROGRAMS=tests_dict tests_list tests_stub_async tests_stub_sync check_getdns tests_dnssec $(CHECK_EV_PROG) $(CHECK_EVENT_PROG) $(CHECK_UV_PROG)
 
 .SUFFIXES: .c .o .a .lo .h
 
@@ -69,8 +81,17 @@ tests_stub_sync: tests_stub_sync.o
 check_getdns_common: check_getdns_common.o
 	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS) -o $@ check_getdns_common.o
 
-check_getdns: check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o
-	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS)  -o $@ check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o
+check_getdns: check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_selectloop.o
+	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS)  -o $@ check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_selectloop.o
+
+check_getdns_event: check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_libevent.o
+	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) -lgetdns_ext_event $(EXTENSION_LIBEVENT_EXT_LIBS) $(LDLIBS)  -o $@ check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_libevent.o
+
+check_getdns_uv: check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_libuv.o
+	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) -lgetdns_ext_uv $(EXTENSION_LIBUV_EXT_LIBS) $(LDLIBS)  -o $@ check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_libuv.o
+
+check_getdns_ev: check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_libev.o
+	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) -lgetdns_ext_ev $(EXTENSION_LIBEV_EXT_LIBS) $(LDLIBS)  -o $@ check_getdns.o check_getdns_common.o check_getdns_context_set_timeout.o check_getdns_libev.o
 
 tests_dnssec: tests_dnssec.o testmessages.o
 	$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) -lgetdns_ext_event $(LDLIBS) -o $@ tests_dnssec.o testmessages.o
@@ -78,6 +99,9 @@ tests_dnssec: tests_dnssec.o testmessages.o
 
 test:	all
 	./check_getdns
+	if test $(have_libevent) = 1 ; then ./$(CHECK_EVENT_PROG) ; fi
+	if test $(have_libev) = 1 ; then ./$(CHECK_EV_PROG) ; fi
+	if test $(have_libuv) = 1 ; then ./$(CHECK_UV_PROG) ; fi
 	@echo "All tests OK"
 
 clean:
diff --git a/src/test/check_getdns_common.c b/src/test/check_getdns_common.c
index d2b20bd2..56d7cc15 100644
--- a/src/test/check_getdns_common.c
+++ b/src/test/check_getdns_common.c
@@ -32,29 +32,11 @@
 #include <check.h>
 #include <getdns/getdns.h>
 #include "config.h"
-#include <dlfcn.h>
-#if HAVE_LIBEVENT
-#include "check_getdns_libevent.h"
-typedef getdns_return_t
-(*getdns_extension_set_libevent_loop_fn)(struct getdns_context *context,
-    struct event_base *this_event_base);
-#endif
-#if HAVE_LIBUV
-#include <uv.h>
-#endif
-#if HAVE_LIBEV
-#include "check_getdns_libev.h"
-#endif
 #include "check_getdns_common.h"
+#include "check_getdns_eventloop.h"
 #include <unistd.h>
 #include <sys/time.h>
 
-#ifdef __APPLE__
-#define SO_EXT ".dylib"
-#else
-#define SO_EXT ".so"
-#endif
-
 int callback_called = 0;
 int callback_completed = 0;
 int callback_canceled = 0;
@@ -335,94 +317,10 @@ void update_callbackfn(struct getdns_context *context,
     changed_item, expected_changed_item);
 }
 
-#define NO_LOOP 0
-#define LIBEVENT_LOOP 1
-#define LIBUV_LOOP 2
-#define LIBEV_LOOP 3
-
-static int get_event_loop_type() {
-    int result = 0;
-    char* loop = getenv("GETDNS_EVLOOP");
-    if (loop && strcmp("libevent", loop) == 0) {
-        result = LIBEVENT_LOOP;
-    }
-    if (loop && strcmp("libuv", loop) == 0) {
-        result = LIBUV_LOOP;
-    }
-    if (loop && strcmp("libev", loop) == 0) {
-        result = LIBEV_LOOP;
-    }
-    return result;
-}
-
 void run_event_loop(struct getdns_context* context, void* eventloop) {
-    int event_loop_type = get_event_loop_type();
-    if (event_loop_type == NO_LOOP) {
-        struct timeval tv;
-        while (getdns_context_get_num_pending_requests(context, &tv) > 0) {
-            int fd = getdns_context_fd(context);
-            fd_set read_fds;
-            FD_ZERO(&read_fds);
-            FD_SET(fd, &read_fds);
-            select(fd + 1, &read_fds, NULL, NULL, &tv);
-            getdns_context_process_async(context);
-        }
-    }
-    // #if HAVE_LIBEVENT
-    // else if (event_loop_type == LIBEVENT_LOOP) {
-    //     struct event_base* base = (struct event_base*) eventloop;
-    //     while (getdns_context_get_num_pending_requests(context, NULL) > 0) {
-    //         event_base_loop(base, EVLOOP_ONCE);
-    //     }
-    // }
-    // #endif
-    // #if HAVE_LIBUV
-    // else if (event_loop_type == LIBUV_LOOP) {
-    //     uv_loop_t* loop = (uv_loop_t*) eventloop;
-    //     while (getdns_context_get_num_pending_requests(context, NULL) > 0) {
-    //         uv_run(loop, UV_RUN_ONCE);
-    //     }
-    // }
-    // #endif
-    // #if HAVE_LIBEV
-    // else if (event_loop_type == LIBEV_LOOP) {
-    //     run_libev_event_loop(context, eventloop);
-    // }
-    // #endif
+    run_event_loop_impl(context, eventloop);
 }
 
 void* create_event_base(struct getdns_context* context) {
-    // int event_loop_type = get_event_loop_type();
-    // #if HAVE_LIBEVENT
-    // if (event_loop_type == LIBEVENT_LOOP) {
-    //     /* load the lib */
-    //     void* ext_library = dlopen("libgetdns_ext_event" SO_EXT, RTLD_LAZY);
-    //     if (!ext_library) { return NULL; }
-    //     void* ext_setter = dlsym(ext_library,"getdns_extension_set_libevent_base");
-    //     if (!ext_setter) { return NULL; }
-    //     getdns_extension_set_libevent_loop_fn fn = (getdns_extension_set_libevent_loop_fn) ext_setter;
-    //     struct event_base* result = event_base_new();
-    //     ck_assert_msg(result != NULL, "Event base creation failed");
-    //     ASSERT_RC(fn(context, result),
-    //         GETDNS_RETURN_GOOD,
-    //         "Return code from getdns_extension_set_libevent_base()");
-    //     return result;
-    // }
-    //#endif
-    // #if HAVE_LIBUV
-    // if (event_loop_type == LIBUV_LOOP) {
-    //     uv_loop_t* result = uv_default_loop();
-    //     ck_assert_msg(result != NULL, "UV loop creation failed");
-    //     ASSERT_RC(getdns_extension_set_libuv_loop(context, result),
-    //         GETDNS_RETURN_GOOD,
-    //         "Return code from getdns_extension_set_libuv_loop()");
-    //     return result;
-    // }
-    // #endif
-    // #if HAVE_LIBEV
-    // if (event_loop_type == LIBEV_LOOP) {
-    //     return create_libev_base(context);
-    // }
-    // #endif
-    return NULL;
+    return create_eventloop_impl(context);
 }
diff --git a/src/test/check_getdns_common.h b/src/test/check_getdns_common.h
index 6144951d..fb94dd14 100644
--- a/src/test/check_getdns_common.h
+++ b/src/test/check_getdns_common.h
@@ -64,9 +64,9 @@
      {                                          				\
        size_t buflen = MAXLEN;							\
        char error_string[MAXLEN];                				\
-       getdns_return_t evaluated_rc = rc;					\
+       uint32_t evaluated_rc = rc;					\
        getdns_strerror(evaluated_rc, error_string, buflen);			\
-       ck_assert_msg(evaluated_rc == expected_rc,				\
+       ck_assert_msg((uint32_t) evaluated_rc == (uint32_t) expected_rc,				\
          "%s: expecting %s: %d, but received: %d: %s",				\
          prefix, #expected_rc, expected_rc, evaluated_rc, error_string);	\
      }
diff --git a/src/test/check_getdns_libev.h b/src/test/check_getdns_eventloop.h
similarity index 89%
rename from src/test/check_getdns_libev.h
rename to src/test/check_getdns_eventloop.h
index 392fb349..9a370016 100644
--- a/src/test/check_getdns_libev.h
+++ b/src/test/check_getdns_eventloop.h
@@ -34,15 +34,13 @@
  */
 
 /* this is used to prevent header conflicts with libevent and libev */
-#ifndef _check_getdns_libev_h_
-#define _check_getdns_libev_h_
+#ifndef _check_getdns_eventloop_h_
+#define _check_getdns_eventloop_h_
 
 #include "config.h"
 
-#if HAVE_LIBEV
 struct getdns_context* context;
-void run_libev_event_loop(struct getdns_context* context, void* eventloop);
-void* create_libev_base(struct getdns_context* context);
-#endif
+void run_event_loop_impl(struct getdns_context* context, void* eventloop);
+void* create_eventloop_impl(struct getdns_context* context);
 
 #endif
diff --git a/src/test/check_getdns_libev.c b/src/test/check_getdns_libev.c
index 4cedbc84..6a5b2455 100644
--- a/src/test/check_getdns_libev.c
+++ b/src/test/check_getdns_libev.c
@@ -33,24 +33,21 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "check_getdns_libev.h"
-
-#if HAVE_LIBEV
+#include "check_getdns_eventloop.h"
 
 #include <getdns/getdns_ext_libev.h>
 #include <ev.h>
 #include <check.h>
 #include "check_getdns_common.h"
 
-void run_libev_event_loop(struct getdns_context* context, void* eventloop) {
+void run_event_loop_impl(struct getdns_context* context, void* eventloop) {
     struct ev_loop* loop = (struct ev_loop*) eventloop;
     while (getdns_context_get_num_pending_requests(context, NULL) > 0) {
         ev_run(loop, EVRUN_ONCE);
     }
 }
 
-
-void* create_libev_base(struct getdns_context* context) {
+void* create_eventloop_impl(struct getdns_context* context) {
     struct ev_loop* result = ev_default_loop(0);
     ck_assert_msg(result != NULL, "EV loop creation failed");
     ASSERT_RC(getdns_extension_set_libev_loop(context, result),
@@ -58,5 +55,3 @@ void* create_libev_base(struct getdns_context* context) {
         "Return code from getdns_extension_set_libev_loop()");
     return result;
 }
-
-#endif
diff --git a/src/test/check_getdns_libevent.c b/src/test/check_getdns_libevent.c
new file mode 100644
index 00000000..d2d39c03
--- /dev/null
+++ b/src/test/check_getdns_libevent.c
@@ -0,0 +1,57 @@
+/**
+ * \file
+ * \brief Public interfaces to getdns, include in your application to use getdns API.
+ *
+ * This source was taken from the original pseudo-implementation by
+ * Paul Hoffman.
+ */
+
+/*
+ * Copyright (c) 2013, NLNet Labs, Versign, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the name of the <organization> nor the
+ *   names of its contributors may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "check_getdns_eventloop.h"
+
+#include <getdns/getdns_ext_libevent.h>
+#include "check_getdns_libevent.h"
+#include <check.h>
+#include "check_getdns_common.h"
+
+void run_event_loop_impl(struct getdns_context* context, void* eventloop) {
+    struct event_base* base = (struct event_base*) eventloop;
+    while (getdns_context_get_num_pending_requests(context, NULL) > 0) {
+        event_base_loop(base, EVLOOP_ONCE);
+    }
+}
+
+void* create_eventloop_impl(struct getdns_context* context) {
+    struct event_base* result = event_base_new();
+    ck_assert_msg(result != NULL, "Event base creation failed");
+    ASSERT_RC(getdns_extension_set_libevent_base(context, result),
+        GETDNS_RETURN_GOOD,
+        "Return code from getdns_extension_set_libevent_base()");
+    return result;
+}
diff --git a/src/test/check_getdns_libuv.c b/src/test/check_getdns_libuv.c
new file mode 100644
index 00000000..c1ffcf77
--- /dev/null
+++ b/src/test/check_getdns_libuv.c
@@ -0,0 +1,58 @@
+/**
+ * \file
+ * \brief Public interfaces to getdns, include in your application to use getdns API.
+ *
+ * This source was taken from the original pseudo-implementation by
+ * Paul Hoffman.
+ */
+
+/*
+ * Copyright (c) 2013, NLNet Labs, Versign, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the name of the <organization> nor the
+ *   names of its contributors may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "check_getdns_eventloop.h"
+
+#include <getdns/getdns_ext_libuv.h>
+#include <uv.h>
+#include <check.h>
+#include "check_getdns_common.h"
+
+void run_event_loop_impl(struct getdns_context* context, void* eventloop) {
+    uv_loop_t* loop = (uv_loop_t*) eventloop;
+    while (getdns_context_get_num_pending_requests(context, NULL) > 0) {
+        uv_run(loop, UV_RUN_ONCE);
+    }
+}
+
+
+void* create_eventloop_impl(struct getdns_context* context) {
+    uv_loop_t* result = uv_default_loop();
+    ck_assert_msg(result != NULL, "UV loop creation failed");
+    ASSERT_RC(getdns_extension_set_libuv_loop(context, result),
+        GETDNS_RETURN_GOOD,
+        "Return code from getdns_extension_set_libuv_loop()");
+    return result;
+}
diff --git a/src/test/check_getdns_selectloop.c b/src/test/check_getdns_selectloop.c
new file mode 100644
index 00000000..d3090bac
--- /dev/null
+++ b/src/test/check_getdns_selectloop.c
@@ -0,0 +1,54 @@
+/**
+ * \file
+ * \brief Public interfaces to getdns, include in your application to use getdns API.
+ *
+ * This source was taken from the original pseudo-implementation by
+ * Paul Hoffman.
+ */
+
+/*
+ * Copyright (c) 2013, NLNet Labs, Versign, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the name of the <organization> nor the
+ *   names of its contributors may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "check_getdns_eventloop.h"
+#include <getdns/getdns_extra.h>
+
+void run_event_loop_impl(struct getdns_context* context, void* eventloop) {
+    struct timeval tv;
+    while (getdns_context_get_num_pending_requests(context, &tv) > 0) {
+        int fd = getdns_context_fd(context);
+        fd_set read_fds;
+        FD_ZERO(&read_fds);
+        FD_SET(fd, &read_fds);
+        select(fd + 1, &read_fds, NULL, NULL, &tv);
+        getdns_context_process_async(context);
+    }
+}
+
+
+void* create_eventloop_impl(struct getdns_context* context) {
+    return NULL;
+}