diff --git a/test-cases/gemini/gemini-1tb-10h.yaml b/test-cases/gemini/gemini-1tb-10h.yaml
index bc82adcbc6..c65210be1d 100644
--- a/test-cases/gemini/gemini-1tb-10h.yaml
+++ b/test-cases/gemini/gemini-1tb-10h.yaml
@@ -15,7 +15,7 @@ nemesis_seed: '041'
 
 gemini_cmd: "gemini -d --duration 8h --warmup 2h -c 50 \
 -m mixed -f --non-interactive --cql-features normal \
---max-mutation-retries 5 --max-mutation-retries-backoff 500ms \
+--max-mutation-retries 10 --max-mutation-retries-backoff 500ms \
 --async-objects-stabilization-attempts 5 --async-objects-stabilization-backoff 500ms \
 --replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '3'}\"
 --oracle-replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '1'}\" "
diff --git a/test-cases/gemini/gemini-3h-with-nemesis.yaml b/test-cases/gemini/gemini-3h-with-nemesis.yaml
index f8c132eb7a..bc87e56069 100644
--- a/test-cases/gemini/gemini-3h-with-nemesis.yaml
+++ b/test-cases/gemini/gemini-3h-with-nemesis.yaml
@@ -3,7 +3,7 @@ n_db_nodes: 3
 n_test_oracle_db_nodes: 1
 n_loaders: 1
 n_monitor_nodes: 1
-instance_type_db: 'i4i.large'
+instance_type_db: 'i4i.2xlarge'
 
 user_prefix: 'gemini-with-nemesis-3h-normal'
 
@@ -18,7 +18,7 @@ nemesis_seed: '032'
 # the below cmd runs about 3 hours
 gemini_cmd: "gemini -d --duration 3h --warmup 30m \
 -c 50 -m mixed -f --non-interactive --cql-features normal \
---max-mutation-retries 5 --max-mutation-retries-backoff 500ms \
+--max-mutation-retries 10 --max-mutation-retries-backoff 500ms \
 --async-objects-stabilization-attempts 5 --async-objects-stabilization-backoff 500ms \
 --replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '3'}\" \
 --oracle-replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '1'}\""
diff --git a/test-cases/gemini/gemini-3h-with-nondisruptive-nemesis.yaml b/test-cases/gemini/gemini-3h-with-nondisruptive-nemesis.yaml
index 3f149cb837..6fd1c317c0 100644
--- a/test-cases/gemini/gemini-3h-with-nondisruptive-nemesis.yaml
+++ b/test-cases/gemini/gemini-3h-with-nondisruptive-nemesis.yaml
@@ -3,7 +3,7 @@ n_db_nodes: 3
 n_test_oracle_db_nodes: 1
 n_loaders: 1
 n_monitor_nodes: 1
-instance_type_db: 'i4i.large'
+instance_type_db: 'i4i.xlarge'
 
 user_prefix: 'gemini-basic-3h'
 
@@ -15,7 +15,7 @@ nemesis_interval: 5
 # the below cmd runs about 3 hours
 gemini_cmd: "gemini -d --duration 10800s --warmup 1800s -c 50 \
 -m mixed -f --non-interactive --cql-features normal \
---max-mutation-retries 5 --max-mutation-retries-backoff 500ms \
+--max-mutation-retries 10 --max-mutation-retries-backoff 500ms \
 --async-objects-stabilization-attempts 5 --async-objects-stabilization-backoff 500ms \
 --replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '3'}\" \
 --oracle-replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '1'}\" "
diff --git a/test-cases/gemini/gemini-8h-large-num-columns.yaml b/test-cases/gemini/gemini-8h-large-num-columns.yaml
index 0ea2c600a0..4e69247127 100644
--- a/test-cases/gemini/gemini-8h-large-num-columns.yaml
+++ b/test-cases/gemini/gemini-8h-large-num-columns.yaml
@@ -20,7 +20,7 @@ gemini_cmd: "gemini -d --duration 7h --warmup 1h \
 -c 10 -m mixed -f --non-interactive \
 --cql-features normal --async-objects-stabilization-backoff 500ms \
 --replication-strategy \"{'class': 'NetworkTopologyStrategy', 'replication_factor': '3'}\" \
---max-mutation-retries 5 --max-mutation-retries-backoff 500ms \
+--max-mutation-retries 10 --max-mutation-retries-backoff 500ms \
 --max-partition-keys 12 --min-partition-keys 8 \
 --max-clustering-keys 20 --min-clustering-keys 12 \
 --max-columns 100 --min-columns 80 --verbose"