diff --git a/packages/browser/src/transports/base.ts b/packages/browser/src/transports/base.ts
index 8fd960593ac5..1f02f3f32996 100644
--- a/packages/browser/src/transports/base.ts
+++ b/packages/browser/src/transports/base.ts
@@ -24,14 +24,10 @@ import {
 
 import { sendReport } from './utils';
 
-const CATEGORY_MAPPING: {
-  [key in SentryRequestType]: string;
-} = {
-  event: 'error',
-  transaction: 'transaction',
-  session: 'session',
-  attachment: 'attachment',
-};
+function requestTypeToCategory(ty: SentryRequestType): string {
+  const tyStr = ty as string;
+  return tyStr === 'event' ? 'error' : tyStr;
+}
 
 const global = getGlobalObject<Window>();
 
@@ -93,7 +89,7 @@ export abstract class BaseTransport implements Transport {
     // We could use nested maps, but it's much easier to read and type this way.
     // A correct type for map-based implementation if we want to go that route
     // would be `Partial<Record<SentryRequestType, Partial<Record<Outcome, number>>>>`
-    const key = `${CATEGORY_MAPPING[category]}:${reason}`;
+    const key = `${requestTypeToCategory(category)}:${reason}`;
     logger.log(`Adding outcome: ${key}`);
     this._outcomes[key] = (this._outcomes[key] ?? 0) + 1;
   }
@@ -180,7 +176,7 @@ export abstract class BaseTransport implements Transport {
    * Gets the time that given category is disabled until for rate limiting
    */
   protected _disabledUntil(requestType: SentryRequestType): Date {
-    const category = CATEGORY_MAPPING[requestType];
+    const category = requestTypeToCategory(requestType);
     return this._rateLimits[category] || this._rateLimits.all;
   }
 
diff --git a/packages/hub/src/session.ts b/packages/hub/src/session.ts
index 654754d2aee7..1bca2377cdd5 100644
--- a/packages/hub/src/session.ts
+++ b/packages/hub/src/session.ts
@@ -125,12 +125,12 @@ export class Session implements SessionInterface {
       errors: this.errors,
       did: typeof this.did === 'number' || typeof this.did === 'string' ? `${this.did}` : undefined,
       duration: this.duration,
-      attrs: dropUndefinedKeys({
+      attrs: {
         release: this.release,
         environment: this.environment,
         ip_address: this.ipAddress,
         user_agent: this.userAgent,
-      }),
+      },
     });
   }
 }
diff --git a/packages/utils/src/dsn.ts b/packages/utils/src/dsn.ts
index 011472e35234..89752e6ccfdf 100644
--- a/packages/utils/src/dsn.ts
+++ b/packages/utils/src/dsn.ts
@@ -1,5 +1,6 @@
 import { DsnComponents, DsnLike, DsnProtocol } from '@sentry/types';
 
+import { isDebugBuild } from './env';
 import { SentryError } from './error';
 
 /** Regular expression used to parse a Dsn. */
@@ -102,22 +103,25 @@ export class Dsn implements DsnComponents {
 
   /** Validates this Dsn and throws on error. */
   private _validate(): void {
-    ['protocol', 'publicKey', 'host', 'projectId'].forEach(component => {
-      if (!this[component as keyof DsnComponents]) {
-        throw new SentryError(`${ERROR_MESSAGE}: ${component} missing`);
+    // we only validate in debug mode.  This will fail later anyways.
+    if (isDebugBuild()) {
+      ['protocol', 'publicKey', 'host', 'projectId'].forEach(component => {
+        if (!this[component as keyof DsnComponents]) {
+          throw new SentryError(`${ERROR_MESSAGE}: ${component} missing`);
+        }
+      });
+
+      if (!this.projectId.match(/^\d+$/)) {
+        throw new SentryError(`${ERROR_MESSAGE}: Invalid projectId ${this.projectId}`);
       }
-    });
 
-    if (!this.projectId.match(/^\d+$/)) {
-      throw new SentryError(`${ERROR_MESSAGE}: Invalid projectId ${this.projectId}`);
-    }
-
-    if (this.protocol !== 'http' && this.protocol !== 'https') {
-      throw new SentryError(`${ERROR_MESSAGE}: Invalid protocol ${this.protocol}`);
-    }
+      if (this.protocol !== 'http' && this.protocol !== 'https') {
+        throw new SentryError(`${ERROR_MESSAGE}: Invalid protocol ${this.protocol}`);
+      }
 
-    if (this.port && isNaN(parseInt(this.port, 10))) {
-      throw new SentryError(`${ERROR_MESSAGE}: Invalid port ${this.port}`);
+      if (this.port && isNaN(parseInt(this.port, 10))) {
+        throw new SentryError(`${ERROR_MESSAGE}: Invalid port ${this.port}`);
+      }
     }
   }
 }
diff --git a/packages/utils/test/dsn.test.ts b/packages/utils/test/dsn.test.ts
index 534346cf0067..804fbe41536c 100644
--- a/packages/utils/test/dsn.test.ts
+++ b/packages/utils/test/dsn.test.ts
@@ -1,6 +1,12 @@
+import { isDebugBuild } from '@sentry/utils';
+
 import { Dsn } from '../src/dsn';
 import { SentryError } from '../src/error';
 
+function testIf(condition: boolean): jest.It {
+  return condition ? test : test.skip;
+}
+
 describe('Dsn', () => {
   describe('fromComponents', () => {
     test('applies all components', () => {
@@ -37,7 +43,7 @@ describe('Dsn', () => {
       expect(dsn.projectId).toBe('123');
     });
 
-    test('throws for missing components', () => {
+    testIf(isDebugBuild())('throws for missing components', () => {
       expect(
         () =>
           new Dsn({
@@ -76,7 +82,7 @@ describe('Dsn', () => {
       ).toThrow(SentryError);
     });
 
-    test('throws for invalid components', () => {
+    testIf(isDebugBuild())('throws for invalid components', () => {
       expect(
         () =>
           new Dsn({
@@ -144,18 +150,18 @@ describe('Dsn', () => {
       expect(dsn.projectId).toBe('321');
     });
 
-    test('throws when provided invalid Dsn', () => {
+    testIf(isDebugBuild())('throws when provided invalid Dsn', () => {
       expect(() => new Dsn('some@random.dsn')).toThrow(SentryError);
     });
 
-    test('throws without mandatory fields', () => {
+    testIf(isDebugBuild())('throws without mandatory fields', () => {
       expect(() => new Dsn('://abc@sentry.io/123')).toThrow(SentryError);
       expect(() => new Dsn('https://@sentry.io/123')).toThrow(SentryError);
       expect(() => new Dsn('https://abc@123')).toThrow(SentryError);
       expect(() => new Dsn('https://abc@sentry.io/')).toThrow(SentryError);
     });
 
-    test('throws for invalid fields', () => {
+    testIf(isDebugBuild())('throws for invalid fields', () => {
       expect(() => new Dsn('httpx://abc@sentry.io/123')).toThrow(SentryError);
       expect(() => new Dsn('httpx://abc@sentry.io:xxx/123')).toThrow(SentryError);
       expect(() => new Dsn('http://abc@sentry.io/abc')).toThrow(SentryError);