From 39c7c60a8a73c3bb8dd18bbf6c0219a2a8771546 Mon Sep 17 00:00:00 2001
From: Utkarsh Umesan Pillai <utpilla@microsoft.com>
Date: Tue, 20 Dec 2022 19:12:40 -0800
Subject: [PATCH] Remove unnecessary usings from exporters, extensions, and
 shim tests (#4027)

---
 .../Implementation/JaegerActivityConversionTest.cs           | 3 ---
 .../JaegerExporterOptionsTests.cs                            | 2 --
 .../JaegerExporterTests.cs                                   | 4 ----
 .../BaseOtlpHttpExportClientTests.cs                         | 1 -
 .../ExporterClientValidationTests.cs                         | 1 -
 .../Http2UnencryptedSupportTests.cs                          | 2 --
 .../ExportClient/OtlpHttpTraceExportClientTests.cs           | 4 ----
 .../IntegrationTests.cs                                      | 4 ----
 .../OtlpAttributeTests.cs                                    | 3 ---
 .../OtlpExporterOptionsExtensionsTests.cs                    | 2 --
 .../OtlpExporterOptionsTests.cs                              | 2 --
 .../OtlpLogExporterTests.cs                                  | 3 ---
 .../OtlpMetricsExporterTests.cs                              | 3 ---
 .../OtlpTestHelpers.cs                                       | 2 --
 .../OtlpTraceExporterTests.cs                                | 3 ---
 .../PrometheusExporterMiddlewareTests.cs                     | 5 -----
 .../PrometheusCollectionManagerTests.cs                      | 3 ---
 .../PrometheusHttpListenerTests.cs                           | 3 ---
 .../PrometheusSerializerTests.cs                             | 1 -
 .../ZPagesExporterTests.cs                                   | 4 ----
 .../Implementation/ZipkinActivityConversionExtensionsTest.cs | 1 -
 .../Implementation/ZipkinActivityConversionTest.cs           | 1 -
 .../ZipkinActivityExporterRemoteEndpointTests.cs             | 1 -
 .../ZipkinExporterTests.cs                                   | 4 ----
 .../HostingMeterExtensionTests.cs                            | 2 --
 .../HostingTracerExtensionTests.cs                           | 2 --
 .../B3PropagatorTest.cs                                      | 2 --
 .../JaegerPropagatorTest.cs                                  | 2 --
 .../ScopeManagerShimTests.cs                                 | 1 -
 .../SpanBuilderShimTests.cs                                  | 3 ---
 .../SpanContextShimTests.cs                                  | 1 -
 test/OpenTelemetry.Shims.OpenTracing.Tests/SpanShimTests.cs  | 3 ---
 .../OpenTelemetry.Shims.OpenTracing.Tests/TracerShimTests.cs | 3 ---
 33 files changed, 81 deletions(-)

diff --git a/test/OpenTelemetry.Exporter.Jaeger.Tests/Implementation/JaegerActivityConversionTest.cs b/test/OpenTelemetry.Exporter.Jaeger.Tests/Implementation/JaegerActivityConversionTest.cs
index ad4d6db9c..6c5bc212b 100644
--- a/test/OpenTelemetry.Exporter.Jaeger.Tests/Implementation/JaegerActivityConversionTest.cs
+++ b/test/OpenTelemetry.Exporter.Jaeger.Tests/Implementation/JaegerActivityConversionTest.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using OpenTelemetry.Internal;
 using OpenTelemetry.Resources;
 using OpenTelemetry.Trace;
diff --git a/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterOptionsTests.cs b/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterOptionsTests.cs
index 851c68fc9..5e86c340e 100644
--- a/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterOptionsTests.cs
+++ b/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterOptionsTests.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
diff --git a/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterTests.cs b/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterTests.cs
index afd276282..411fbeba3 100644
--- a/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterTests.cs
+++ b/test/OpenTelemetry.Exporter.Jaeger.Tests/JaegerExporterTests.cs
@@ -14,12 +14,8 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
-using System.Linq;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using OpenTelemetry.Exporter.Jaeger.Implementation;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/BaseOtlpHttpExportClientTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/BaseOtlpHttpExportClientTests.cs
index 6acbb4ad5..1feeb03a4 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/BaseOtlpHttpExportClientTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/BaseOtlpHttpExportClientTests.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Net.Http;
 using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation.ExportClient;
 using Xunit;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/ExporterClientValidationTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/ExporterClientValidationTests.cs
index 566738527..a06e3c593 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/ExporterClientValidationTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/ExporterClientValidationTests.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation.ExportClient;
 using Xunit;
 
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Http2UnencryptedSupportTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Http2UnencryptedSupportTests.cs
index 87d0fa2c1..990f4ab0f 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Http2UnencryptedSupportTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Http2UnencryptedSupportTests.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-
 namespace OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests
 {
     public class Http2UnencryptedSupportTests : IDisposable
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Implementation/ExportClient/OtlpHttpTraceExportClientTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Implementation/ExportClient/OtlpHttpTraceExportClientTests.cs
index 0957dc02c..bd21628cd 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Implementation/ExportClient/OtlpHttpTraceExportClientTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/Implementation/ExportClient/OtlpHttpTraceExportClientTests.cs
@@ -14,12 +14,8 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using System.Net.Http;
-using System.Threading;
 #if !NET6_0_OR_GREATER
 using System.Threading.Tasks;
 #endif
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/IntegrationTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/IntegrationTests.cs
index 48ed182f5..3646c40db 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/IntegrationTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/IntegrationTests.cs
@@ -14,13 +14,9 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.Metrics;
 using System.Diagnostics.Tracing;
-using System.Linq;
-using System.Threading;
 using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation;
 using OpenTelemetry.Metrics;
 using OpenTelemetry.Tests;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpAttributeTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpAttributeTests.cs
index 74391bb78..d5b3af9b6 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpAttributeTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpAttributeTests.cs
@@ -14,9 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation;
 using Xunit;
 using OtlpCommon = OpenTelemetry.Proto.Common.V1;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsExtensionsTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsExtensionsTests.cs
index bc68e4349..acb49cf71 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsExtensionsTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsExtensionsTests.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation.ExportClient;
 using Xunit;
 using Xunit.Sdk;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsTests.cs
index f1b036382..c60ac1498 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpExporterOptionsTests.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using Microsoft.Extensions.Configuration;
 using Xunit;
 
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpLogExporterTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpLogExporterTests.cs
index eeb914769..e3406d56c 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpLogExporterTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpLogExporterTests.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpMetricsExporterTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpMetricsExporterTests.cs
index fd11e42c3..48e41e3fb 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpMetricsExporterTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpMetricsExporterTests.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics.Metrics;
-using System.Linq;
 using Microsoft.Extensions.DependencyInjection;
 using OpenTelemetry.Exporter.OpenTelemetryProtocol.Implementation;
 using OpenTelemetry.Metrics;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTestHelpers.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTestHelpers.cs
index 91a15f81e..dc2b0a3d8 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTestHelpers.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTestHelpers.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System.Collections.Generic;
-using System.Linq;
 using Google.Protobuf.Collections;
 using Xunit;
 using OtlpCommon = OpenTelemetry.Proto.Common.V1;
diff --git a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTraceExporterTests.cs b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTraceExporterTests.cs
index 3fe9ac9f5..37ae08abb 100644
--- a/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTraceExporterTests.cs
+++ b/test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpTraceExporterTests.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using Google.Protobuf.Collections;
 using Microsoft.Extensions.DependencyInjection;
 using Moq;
diff --git a/test/OpenTelemetry.Exporter.Prometheus.AspNetCore.Tests/PrometheusExporterMiddlewareTests.cs b/test/OpenTelemetry.Exporter.Prometheus.AspNetCore.Tests/PrometheusExporterMiddlewareTests.cs
index cdb0aebdc..6cd618e50 100644
--- a/test/OpenTelemetry.Exporter.Prometheus.AspNetCore.Tests/PrometheusExporterMiddlewareTests.cs
+++ b/test/OpenTelemetry.Exporter.Prometheus.AspNetCore.Tests/PrometheusExporterMiddlewareTests.cs
@@ -15,14 +15,9 @@
 // </copyright>
 
 #if !NETFRAMEWORK
-using System;
-using System.Collections.Generic;
 using System.Diagnostics.Metrics;
-using System.Linq;
 using System.Net;
-using System.Net.Http;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.TestHost;
diff --git a/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusCollectionManagerTests.cs b/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusCollectionManagerTests.cs
index d33295de2..9439a784f 100644
--- a/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusCollectionManagerTests.cs
+++ b/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusCollectionManagerTests.cs
@@ -14,13 +14,10 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics.Metrics;
 #if NETFRAMEWORK
 using System.Linq;
 #endif
-using System.Threading;
-using System.Threading.Tasks;
 using OpenTelemetry.Metrics;
 using OpenTelemetry.Tests;
 using Xunit;
diff --git a/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusHttpListenerTests.cs b/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusHttpListenerTests.cs
index ac4df51bb..7e7737919 100644
--- a/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusHttpListenerTests.cs
+++ b/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusHttpListenerTests.cs
@@ -14,12 +14,9 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics.Metrics;
 using System.Net;
 using System.Net.Http;
-using System.Threading.Tasks;
 using OpenTelemetry.Metrics;
 using OpenTelemetry.Tests;
 using Xunit;
diff --git a/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusSerializerTests.cs b/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusSerializerTests.cs
index f6e91cbab..9970be5c8 100644
--- a/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusSerializerTests.cs
+++ b/test/OpenTelemetry.Exporter.Prometheus.HttpListener.Tests/PrometheusSerializerTests.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System.Collections.Generic;
 using System.Diagnostics.Metrics;
 using System.Text;
 using OpenTelemetry.Metrics;
diff --git a/test/OpenTelemetry.Exporter.ZPages.Tests/ZPagesExporterTests.cs b/test/OpenTelemetry.Exporter.ZPages.Tests/ZPagesExporterTests.cs
index 745baf3cb..9d4a2bdfe 100644
--- a/test/OpenTelemetry.Exporter.ZPages.Tests/ZPagesExporterTests.cs
+++ b/test/OpenTelemetry.Exporter.ZPages.Tests/ZPagesExporterTests.cs
@@ -14,12 +14,8 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using System.Net.Http;
-using System.Threading.Tasks;
 using OpenTelemetry.Exporter.ZPages.Implementation;
 using OpenTelemetry.Resources;
 using OpenTelemetry.Tests;
diff --git a/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionExtensionsTest.cs b/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionExtensionsTest.cs
index 04552591f..516c7d587 100644
--- a/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionExtensionsTest.cs
+++ b/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionExtensionsTest.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System.Collections.Generic;
 using System.Diagnostics;
 using OpenTelemetry.Internal;
 using Xunit;
diff --git a/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionTest.cs b/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionTest.cs
index 0c3c7f166..6f450b358 100644
--- a/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionTest.cs
+++ b/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityConversionTest.cs
@@ -15,7 +15,6 @@
 // </copyright>
 
 using System.Diagnostics;
-using System.Linq;
 using OpenTelemetry.Exporter.Zipkin.Tests;
 using OpenTelemetry.Internal;
 using OpenTelemetry.Trace;
diff --git a/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityExporterRemoteEndpointTests.cs b/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityExporterRemoteEndpointTests.cs
index 8f17ea064..b89c50c86 100644
--- a/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityExporterRemoteEndpointTests.cs
+++ b/test/OpenTelemetry.Exporter.Zipkin.Tests/Implementation/ZipkinActivityExporterRemoteEndpointTests.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System.Collections.Generic;
 using OpenTelemetry.Exporter.Zipkin.Tests;
 using OpenTelemetry.Trace;
 using Xunit;
diff --git a/test/OpenTelemetry.Exporter.Zipkin.Tests/ZipkinExporterTests.cs b/test/OpenTelemetry.Exporter.Zipkin.Tests/ZipkinExporterTests.cs
index 188989123..5baf61687 100644
--- a/test/OpenTelemetry.Exporter.Zipkin.Tests/ZipkinExporterTests.cs
+++ b/test/OpenTelemetry.Exporter.Zipkin.Tests/ZipkinExporterTests.cs
@@ -14,12 +14,8 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
-using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Text;
diff --git a/test/OpenTelemetry.Extensions.Hosting.Tests/HostingMeterExtensionTests.cs b/test/OpenTelemetry.Extensions.Hosting.Tests/HostingMeterExtensionTests.cs
index a88ce06aa..c6adc3310 100644
--- a/test/OpenTelemetry.Extensions.Hosting.Tests/HostingMeterExtensionTests.cs
+++ b/test/OpenTelemetry.Extensions.Hosting.Tests/HostingMeterExtensionTests.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System.Collections.Generic;
-using System.Threading.Tasks;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
diff --git a/test/OpenTelemetry.Extensions.Hosting.Tests/HostingTracerExtensionTests.cs b/test/OpenTelemetry.Extensions.Hosting.Tests/HostingTracerExtensionTests.cs
index 5069c8141..133a78933 100644
--- a/test/OpenTelemetry.Extensions.Hosting.Tests/HostingTracerExtensionTests.cs
+++ b/test/OpenTelemetry.Extensions.Hosting.Tests/HostingTracerExtensionTests.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System.Collections.Generic;
-using System.Threading.Tasks;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
diff --git a/test/OpenTelemetry.Extensions.Propagators.Tests/B3PropagatorTest.cs b/test/OpenTelemetry.Extensions.Propagators.Tests/B3PropagatorTest.cs
index cbf51ed21..e0f20cbc2 100644
--- a/test/OpenTelemetry.Extensions.Propagators.Tests/B3PropagatorTest.cs
+++ b/test/OpenTelemetry.Extensions.Propagators.Tests/B3PropagatorTest.cs
@@ -13,8 +13,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // </copyright>
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using OpenTelemetry.Context.Propagation;
 using Xunit;
diff --git a/test/OpenTelemetry.Extensions.Propagators.Tests/JaegerPropagatorTest.cs b/test/OpenTelemetry.Extensions.Propagators.Tests/JaegerPropagatorTest.cs
index 05f174561..9c2e7cbe8 100644
--- a/test/OpenTelemetry.Extensions.Propagators.Tests/JaegerPropagatorTest.cs
+++ b/test/OpenTelemetry.Extensions.Propagators.Tests/JaegerPropagatorTest.cs
@@ -13,8 +13,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // </copyright>
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using OpenTelemetry.Context.Propagation;
 using Xunit;
diff --git a/test/OpenTelemetry.Shims.OpenTracing.Tests/ScopeManagerShimTests.cs b/test/OpenTelemetry.Shims.OpenTracing.Tests/ScopeManagerShimTests.cs
index 8ac7f2fd2..ddf86fe77 100644
--- a/test/OpenTelemetry.Shims.OpenTracing.Tests/ScopeManagerShimTests.cs
+++ b/test/OpenTelemetry.Shims.OpenTracing.Tests/ScopeManagerShimTests.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics;
 using Moq;
 using OpenTelemetry.Trace;
diff --git a/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanBuilderShimTests.cs b/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanBuilderShimTests.cs
index 27f9cc11c..f5393fd41 100644
--- a/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanBuilderShimTests.cs
+++ b/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanBuilderShimTests.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using OpenTelemetry.Trace;
 using Xunit;
 
diff --git a/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanContextShimTests.cs b/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanContextShimTests.cs
index 65c963cff..8b881938e 100644
--- a/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanContextShimTests.cs
+++ b/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanContextShimTests.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics;
 using OpenTelemetry.Trace;
 using Xunit;
diff --git a/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanShimTests.cs b/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanShimTests.cs
index ad2d68c68..1f4241bca 100644
--- a/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanShimTests.cs
+++ b/test/OpenTelemetry.Shims.OpenTracing.Tests/SpanShimTests.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using OpenTelemetry.Trace;
 using OpenTracing.Tag;
 using Xunit;
diff --git a/test/OpenTelemetry.Shims.OpenTracing.Tests/TracerShimTests.cs b/test/OpenTelemetry.Shims.OpenTracing.Tests/TracerShimTests.cs
index 34da433e7..705930327 100644
--- a/test/OpenTelemetry.Shims.OpenTracing.Tests/TracerShimTests.cs
+++ b/test/OpenTelemetry.Shims.OpenTracing.Tests/TracerShimTests.cs
@@ -14,11 +14,8 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Collections;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
 using Moq;
 using OpenTelemetry.Context.Propagation;
 using OpenTelemetry.Trace;