if err != nil {
			t.Fatalf("Test %d: Failed to create HTTP request for Put Object: <ERROR> %v", i+1, err)
		}
		// Removes auth header if test case requires it.
		if testCase.removeAuthHeader {
			req.Header.Del("Authorization")
		}
		switch testCase.fault {
		case malformedEncoding:
			req, err = malformChunkSizeSigV4(req, testCase.chunkSize-1)
		case signatureMismatch:
			req, err = malformDataSigV4(req, 'z')