diff --git a/tests/queries/0_stateless/01305_nullable-prewhere_bug.reference b/tests/queries/0_stateless/01305_nullable-prewhere_bug.reference
new file mode 100644
index 00000000000..bd81ae06cec
--- /dev/null
+++ b/tests/queries/0_stateless/01305_nullable-prewhere_bug.reference
@@ -0,0 +1 @@
+some_field_value	1
diff --git a/tests/queries/0_stateless/01305_nullable-prewhere_bug.sql b/tests/queries/0_stateless/01305_nullable-prewhere_bug.sql
new file mode 100644
index 00000000000..35d3762660f
--- /dev/null
+++ b/tests/queries/0_stateless/01305_nullable-prewhere_bug.sql
@@ -0,0 +1,5 @@
+drop table if exists data;
+CREATE TABLE data (ts DateTime, field String, num_field Nullable(Float64)) ENGINE = MergeTree() PARTITION BY ts ORDER BY ts;
+insert into data values(toDateTime('2020-05-14 02:08:00'),'some_field_value',7.);
+SELECT field, countIf(num_field > 6.0) FROM data PREWHERE (num_field>6.0) GROUP BY field;
+drop table if exists data;