diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_duration.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_duration.test.ts
index 4517ef38865956..b764b83ea93496 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_duration.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_duration.test.ts
@@ -153,7 +153,7 @@ describe('APM Transaction Duration Transform Generator', () => {
     expect(transform.pivot?.group_by).toMatchSnapshot();
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLO({
       indicator: createAPMTransactionDurationIndicator(),
       settings: {
@@ -163,7 +163,7 @@ describe('APM Transaction Duration Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, spaceId, dataViewsService);
+    const transform = await generator.getTransformParams(slo, spaceId, dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);
diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_error_rate.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_error_rate.test.ts
index 327a31029b076e..13c73443960afe 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_error_rate.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/apm_transaction_error_rate.test.ts
@@ -156,7 +156,7 @@ describe('APM Transaction Error Rate Transform Generator', () => {
     expect(transform.pivot?.group_by).toMatchSnapshot();
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLO({
       indicator: createAPMTransactionErrorRateIndicator(),
       settings: {
@@ -166,7 +166,7 @@ describe('APM Transaction Error Rate Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, spaceId, dataViewsService);
+    const transform = await generator.getTransformParams(slo, spaceId, dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);
diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/histogram.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/histogram.test.ts
index ac77d247bb7cd8..ea342397dd82a9 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/histogram.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/histogram.test.ts
@@ -31,12 +31,13 @@ describe('Histogram Transform Generator', () => {
           },
         }),
       });
+
       expect(generator.getTransformParams(anSLO, spaceId, dataViewsService)).rejects.toThrow(
         /Invalid KQL: foo:/
       );
     });
 
-    it('throws when the total filter is invalid', () => {
+    it('throws when the total filter is invalid', async () => {
       const anSLO = createSLO({
         indicator: createHistogramIndicator({
           good: {
@@ -46,6 +47,7 @@ describe('Histogram Transform Generator', () => {
           },
         }),
       });
+
       expect(generator.getTransformParams(anSLO, spaceId, dataViewsService)).rejects.toThrow(
         /Invalid KQL: foo:/
       );
@@ -174,7 +176,7 @@ describe('Histogram Transform Generator', () => {
     expect(transform.pivot!.aggregations!['slo.denominator']).toMatchSnapshot();
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLO({
       indicator: createHistogramIndicator(),
       settings: {
@@ -184,7 +186,7 @@ describe('Histogram Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, spaceId, dataViewsService);
+    const transform = await generator.getTransformParams(slo, spaceId, dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);
diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/kql_custom.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/kql_custom.test.ts
index d41ed8fbcb2e2f..8f15bc49f134b5 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/kql_custom.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/kql_custom.test.ts
@@ -130,7 +130,7 @@ describe('KQL Custom Transform Generator', () => {
     expect(transform.pivot!.aggregations!['slo.denominator']).toMatchSnapshot();
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLO({
       indicator: createKQLCustomIndicator(),
       settings: {
@@ -140,7 +140,7 @@ describe('KQL Custom Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, spaceId, dataViewsService);
+    const transform = await generator.getTransformParams(slo, spaceId, dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);
diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/metric_custom.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/metric_custom.test.ts
index 2ece33b94ff19a..8484c9ef0edb9b 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/metric_custom.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/metric_custom.test.ts
@@ -229,7 +229,7 @@ describe('Metric Custom Transform Generator', () => {
     expect(transform.pivot!.aggregations!['slo.denominator']).toMatchSnapshot();
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLO({
       indicator: createMetricCustomIndicator(),
       settings: {
@@ -239,7 +239,7 @@ describe('Metric Custom Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, spaceId, dataViewsService);
+    const transform = await generator.getTransformParams(slo, spaceId, dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);
diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/synthetics_availability.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/synthetics_availability.test.ts
index 362310a2a3fdf6..b292b8d12f342f 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/synthetics_availability.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/synthetics_availability.test.ts
@@ -407,7 +407,7 @@ describe('Synthetics Availability Transform Generator', () => {
     });
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLO({
       indicator: createSyntheticsAvailabilityIndicator(),
       settings: {
@@ -417,7 +417,7 @@ describe('Synthetics Availability Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, 'default', dataViewsService);
+    const transform = await generator.getTransformParams(slo, 'default', dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);
diff --git a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/timeslice_metric.test.ts b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/timeslice_metric.test.ts
index 8351d0e36e05c8..9986f9690c84a7 100644
--- a/x-pack/plugins/observability_solution/slo/server/services/transform_generators/timeslice_metric.test.ts
+++ b/x-pack/plugins/observability_solution/slo/server/services/transform_generators/timeslice_metric.test.ts
@@ -175,7 +175,7 @@ describe('Timeslice Metric Transform Generator', () => {
     });
   });
 
-  it("overrides the range filter when 'preventInitialBackfill' is true", () => {
+  it("overrides the range filter when 'preventInitialBackfill' is true", async () => {
     const slo = createSLOWithTimeslicesBudgetingMethod({
       indicator: everythingIndicator,
       settings: {
@@ -185,7 +185,7 @@ describe('Timeslice Metric Transform Generator', () => {
       },
     });
 
-    const transform = generator.getTransformParams(slo, spaceId, dataViewsService);
+    const transform = await generator.getTransformParams(slo, spaceId, dataViewsService);
 
     // @ts-ignore
     const rangeFilter = transform.source.query.bool.filter.find((f) => 'range' in f);