diff --git a/exporters/common/src/main/java/io/opentelemetry/exporter/internal/TlsConfigHelper.java b/exporters/common/src/main/java/io/opentelemetry/exporter/internal/TlsConfigHelper.java
index 5c2f89e9372..9ded82943fd 100644
--- a/exporters/common/src/main/java/io/opentelemetry/exporter/internal/TlsConfigHelper.java
+++ b/exporters/common/src/main/java/io/opentelemetry/exporter/internal/TlsConfigHelper.java
@@ -45,6 +45,9 @@ public TlsConfigHelper() {}
    * @param trustedCertsPem Certificate in PEM format.
    */
   public void setTrustManagerFromCerts(byte[] trustedCertsPem) {
+    if (sslContext != null) {
+      throw new IllegalStateException("sslContext has been previously configured");
+    }
     if (trustManager != null) {
       throw new IllegalStateException("trustManager has been previously configured");
     }
@@ -72,6 +75,9 @@ public void setKeyManagerFromCerts(byte[] privateKeyPem, byte[] certificatePem)
     if (keyManager != null) {
       throw new IllegalStateException("keyManager has been previously configured");
     }
+    if (sslContext != null) {
+      throw new IllegalStateException("sslContext has been previously configured");
+    }
 
     try {
       keyManager = TlsUtil.keyManager(privateKeyPem, certificatePem);
@@ -95,6 +101,9 @@ public void setSslContext(SSLContext sslContext, X509TrustManager trustManager)
     if (this.sslContext != null || this.trustManager != null) {
       throw new IllegalStateException("sslContext or trustManager has been previously configured");
     }
+    if (this.keyManager != null) {
+      throw new IllegalStateException("keyManager has been previously configured");
+    }
     this.trustManager = trustManager;
     this.sslContext = sslContext;
   }
diff --git a/exporters/common/src/test/java/io/opentelemetry/exporter/internal/TlsConfigHelperTest.java b/exporters/common/src/test/java/io/opentelemetry/exporter/internal/TlsConfigHelperTest.java
index 83736d5eb06..267d13da0da 100644
--- a/exporters/common/src/test/java/io/opentelemetry/exporter/internal/TlsConfigHelperTest.java
+++ b/exporters/common/src/test/java/io/opentelemetry/exporter/internal/TlsConfigHelperTest.java
@@ -45,7 +45,7 @@ void createTrustManager_AlreadyExists_Throws() throws Exception {
         SSLContext.getInstance("TLS"), TlsUtil.trustManager(serverTls.certificate().getEncoded()));
     assertThatThrownBy(() -> helper.setTrustManagerFromCerts(serverTls.certificate().getEncoded()))
         .isInstanceOf(IllegalStateException.class)
-        .hasMessageContaining("trustManager has been previously configured");
+        .hasMessageContaining("sslContext has been previously configured");
   }
 
   @Test
@@ -66,6 +66,16 @@ void createKeyManager_AlreadyExists_Throws() throws Exception {
                     serverTls.privateKey().getEncoded(), serverTls.certificate().getEncoded()))
         .isInstanceOf(IllegalStateException.class)
         .hasMessageContaining("keyManager has been previously configured");
+
+    helper = new TlsConfigHelper();
+    helper.setSslContext(
+        SSLContext.getInstance("TLS"), TlsUtil.trustManager(serverTls.certificate().getEncoded()));
+    assertThatThrownBy(
+            () ->
+                helper.setKeyManagerFromCerts(
+                    serverTls.privateKey().getEncoded(), serverTls.certificate().getEncoded()))
+        .isInstanceOf(IllegalStateException.class)
+        .hasMessageContaining("sslContext has been previously configured");
   }
 
   @Test
@@ -93,5 +103,12 @@ void setSslContext_AlreadyExists_Throws() throws Exception {
     assertThatThrownBy(() -> helper.setSslContext(sslContext, trustManager))
         .isInstanceOf(IllegalStateException.class)
         .hasMessageContaining("sslContext or trustManager has been previously configured");
+
+    helper = new TlsConfigHelper();
+    helper.setKeyManagerFromCerts(
+        serverTls.privateKey().getEncoded(), serverTls.certificate().getEncoded());
+    assertThatThrownBy(() -> helper.setSslContext(sslContext, trustManager))
+        .isInstanceOf(IllegalStateException.class)
+        .hasMessageContaining("keyManager has been previously configured");
   }
 }