diff --git a/cg/models/analysis.py b/cg/models/analysis.py
index c2e3eb8b80..9cf50f63c4 100644
--- a/cg/models/analysis.py
+++ b/cg/models/analysis.py
@@ -1,4 +1,4 @@
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, Field
 
 from cg.models.raredisease.raredisease import RarediseaseQCMetrics
 from cg.models.rnafusion.rnafusion import RnafusionQCMetrics
@@ -15,6 +15,9 @@ class AnalysisModel(BaseModel):
 class NextflowAnalysis(AnalysisModel):
     """Nextflow's analysis results model."""
 
-    sample_metrics: dict[
-        str, RarediseaseQCMetrics | RnafusionQCMetrics | TaxprofilerQCMetrics | TomteQCMetrics
-    ]
+    sample_metrics: (
+        dict[str, RarediseaseQCMetrics]
+        | dict[str, RnafusionQCMetrics]
+        | dict[str, TaxprofilerQCMetrics]
+        | dict[str, TomteQCMetrics]
+    ) = Field(union_mode="left_to_right")
diff --git a/cg/models/taxprofiler/taxprofiler.py b/cg/models/taxprofiler/taxprofiler.py
index fbf585a27a..ed3433a3f3 100644
--- a/cg/models/taxprofiler/taxprofiler.py
+++ b/cg/models/taxprofiler/taxprofiler.py
@@ -1,12 +1,13 @@
 from pathlib import Path
 
-from pydantic import BaseModel, Field
+from pydantic import Field
 
 from cg.constants.sequencing import SequencingPlatform
 from cg.models.nf_analysis import NextflowSampleSheetEntry, WorkflowParameters
+from cg.models.qc_metrics import QCMetrics
 
 
-class TaxprofilerQCMetrics(BaseModel):
+class TaxprofilerQCMetrics(QCMetrics):
     """Taxprofiler QC metrics."""
 
     after_filtering_gc_content: float
diff --git a/tests/meta/workflow/test_rnafusion.py b/tests/meta/workflow/test_rnafusion.py
index 5ee071e03d..d88f257afb 100644
--- a/tests/meta/workflow/test_rnafusion.py
+++ b/tests/meta/workflow/test_rnafusion.py
@@ -21,7 +21,7 @@ def test_parse_analysis(
     qc_metrics: list[MetricsBase] = analysis_api.get_multiqc_json_metrics(case_id=rnafusion_case_id)
 
     # WHEN extracting the analysis model
-    analysis_model: NextflowAnalysis = analysis_api.parse_analysis(qc_metrics_raw=qc_metrics)
+    analysis_model: NextflowAnalysis = analysis_api.parse_analysis(qc_metrics)
 
     # THEN the analysis model and its content should have been correctly extracted
     assert analysis_model.sample_metrics[sample_id].model_dump() == rnafusion_metrics