diff --git a/tests/bin/cohttp_client.ml b/tests/bin/cohttp_client.ml
index 7c20f0fc..847d363f 100644
--- a/tests/bin/cohttp_client.ml
+++ b/tests/bin/cohttp_client.ml
@@ -1,7 +1,6 @@
 module OT = Opentelemetry
 module Otel_lwt = Opentelemetry_lwt
 
-let spf = Printf.sprintf
 
 let ( let@ ) f x = f x
 
diff --git a/tests/bin/emit1.ml b/tests/bin/emit1.ml
index e608d296..2bbfb7a2 100644
--- a/tests/bin/emit1.ml
+++ b/tests/bin/emit1.ml
@@ -1,7 +1,6 @@
 module OT = Opentelemetry
 module Atomic = Opentelemetry_atomic.Atomic
 
-let spf = Printf.sprintf
 
 let ( let@ ) = ( @@ )
 
diff --git a/tests/bin/emit1_cohttp.ml b/tests/bin/emit1_cohttp.ml
index 162a8011..0179a458 100644
--- a/tests/bin/emit1_cohttp.ml
+++ b/tests/bin/emit1_cohttp.ml
@@ -2,7 +2,6 @@ module T = Opentelemetry_lwt
 module Atomic = Opentelemetry_atomic.Atomic
 open Lwt.Syntax
 
-let spf = Printf.sprintf
 
 let ( let@ ) f x = f x
 
diff --git a/tests/bin/emit1_eio.ml b/tests/bin/emit1_eio.ml
index 56067bf2..c966f92a 100644
--- a/tests/bin/emit1_eio.ml
+++ b/tests/bin/emit1_eio.ml
@@ -1,7 +1,6 @@
 module OT = Opentelemetry
 module Atomic = Opentelemetry_atomic.Atomic
 
-let spf = Printf.sprintf
 
 let ( let@ ) f x = f x
 
diff --git a/tests/bin/emit1_ocurl_lwt.ml b/tests/bin/emit1_ocurl_lwt.ml
index 02acfb6d..1dd7c0a6 100644
--- a/tests/bin/emit1_ocurl_lwt.ml
+++ b/tests/bin/emit1_ocurl_lwt.ml
@@ -1,7 +1,6 @@
 module OT = Opentelemetry
 module Atomic = Opentelemetry_atomic.Atomic
 
-let spf = Printf.sprintf
 
 let ( let@ ) = ( @@ )
 
diff --git a/tests/bin/emit1_stdout.ml b/tests/bin/emit1_stdout.ml
index 4ea4526d..a66c615d 100644
--- a/tests/bin/emit1_stdout.ml
+++ b/tests/bin/emit1_stdout.ml
@@ -1,7 +1,6 @@
 module OT = Opentelemetry
 module OTC = Opentelemetry_client
 
-let spf = Printf.sprintf
 
 let ( let@ ) = ( @@ )
 
diff --git a/tests/client_e2e/test_cohttp_eio_client_e2e.ml b/tests/client_e2e/test_cohttp_eio_client_e2e.ml
index d093ed1b..04ef9a78 100644
--- a/tests/client_e2e/test_cohttp_eio_client_e2e.ml
+++ b/tests/client_e2e/test_cohttp_eio_client_e2e.ml
@@ -1,5 +1,3 @@
-module Client = Opentelemetry_client
-module Proto = Opentelemetry.Proto
 open Clients_e2e_lib
 
 (* NOTE: This port must be different from that used by other integration tests,
diff --git a/tests/client_e2e/test_cohttp_lwt_client_e2e.ml b/tests/client_e2e/test_cohttp_lwt_client_e2e.ml
index be63a959..94da1c25 100644
--- a/tests/client_e2e/test_cohttp_lwt_client_e2e.ml
+++ b/tests/client_e2e/test_cohttp_lwt_client_e2e.ml
@@ -1,5 +1,3 @@
-module Client = Opentelemetry_client
-module Proto = Opentelemetry.Proto
 open Clients_e2e_lib
 
 (* NOTE: This port must be different from that used by other integration tests,
diff --git a/tests/client_e2e/test_ocurl_client_e2e.ml b/tests/client_e2e/test_ocurl_client_e2e.ml
index d6980205..96ee34c3 100644
--- a/tests/client_e2e/test_ocurl_client_e2e.ml
+++ b/tests/client_e2e/test_ocurl_client_e2e.ml
@@ -1,5 +1,3 @@
-module Client = Opentelemetry_client
-module Proto = Opentelemetry.Proto
 open Clients_e2e_lib
 
 (* NOTE: This port must be different from that used by other integration tests,
diff --git a/tests/client_e2e/test_ocurl_lwt_client_e2e.ml b/tests/client_e2e/test_ocurl_lwt_client_e2e.ml
index 96e0b2d8..b7c7d28c 100644
--- a/tests/client_e2e/test_ocurl_lwt_client_e2e.ml
+++ b/tests/client_e2e/test_ocurl_lwt_client_e2e.ml
@@ -1,5 +1,3 @@
-module Client = Opentelemetry_client
-module Proto = Opentelemetry.Proto
 open Clients_e2e_lib
 
 (* NOTE: This port must be different from that used by other integration tests,