diff --git a/README.md b/README.md
index 8d7dbec..4b194e0 100644
--- a/README.md
+++ b/README.md
@@ -37,14 +37,14 @@ We recommend protecting the `main` branch and to allow new code pushes only via
 
 | Name | Version |
 |------|---------|
-| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.7.0 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.40.0 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.6.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 4.55.0 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.40.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 4.55.0 |
 
 ## Modules
 
@@ -67,7 +67,7 @@ No modules.
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | <a name="input_cloudfront"></a> [cloudfront](#input\_cloudfront) | The name of the s3 bucket containing the cloudfront logs. Creates a db and saved cloudfront queries if set. | `string` | `null` | no |
-| <a name="input_cloudtrail"></a> [cloudtrail](#input\_cloudtrail) | Configuration for cloudtrail. Creates a db and saved cloudfront queries if bucket\_name is set. Only set prefix if you configured one in your cloudtrail | <pre>object({<br/>    bucket_name = optional(string)<br/>    prefix      = optional(string)<br/>  })</pre> | `{}` | no |
+| <a name="input_cloudtrail"></a> [cloudtrail](#input\_cloudtrail) | Configuration for cloudtrail. Creates a db and saved cloudfront queries if bucket\_name is set. Only set prefix if you configured one in your cloudtrail | <pre>object({<br/>    bucket_name = string<br/>    prefix      = optional(string)<br/>  })</pre> | <pre>{<br/>  "bucket_name": null<br/>}</pre> | no |
 | <a name="input_query_bucket_name"></a> [query\_bucket\_name](#input\_query\_bucket\_name) | The name of the bucket to save the query into. | `string` | n/a | yes |
 | <a name="input_ses"></a> [ses](#input\_ses) | The name of the s3 bucket containing the ses logs. Creates a db and saved ses queries if set | `string` | `null` | no |
 
diff --git a/main.tf b/main.tf
index 81c93fd..0548103 100644
--- a/main.tf
+++ b/main.tf
@@ -1,17 +1,17 @@
 locals {
   named_queries = {
     cloudfront = var.cloudfront != null ? {
-      cloudfront_create_log_table               = "Create the table for CloudFront logs",
-      cloudfront_log_yesterday_today            = "Show requests to CloudFront yesterday and today",
-      cloudfront_log_yesterday_today_for_ip     = "Show requests to CloudFront from a given IP yesterday and today"
+      cloudfront_create_log_table               = "Creates the table for CloudFront logs",
+      cloudfront_log_yesterday_today            = "Shows requests to CloudFront yesterday and today",
+      cloudfront_log_yesterday_today_for_ip     = "Shows requests to CloudFront from a given IP yesterday and today"
       cloudfront_logs_for_specific_distribution = "Shows requests to a given cloudfront distribution, with optional filter for date, status code or ssl_protocol"
     } : {}
     cloudtrail = var.cloudtrail.bucket_name != null ? {
-      cloudtrail_create_log_table = "Create the table for CloudTrail logs",
+      cloudtrail_create_log_table = "Creates the table for CloudTrail logs",
       cloudtrail_console_login    = "Displays console login events, ordered by date"
     } : {}
     ses = var.ses != null ? {
-      ses_create_log_table             = "Create the table for SES logs"
+      ses_create_log_table             = "Creates the table for SES logs"
       ses_bounce_ratio                 = "Displays bounced email as % of send emails"
       ses_formatted_mails              = "Displays only the most relevant information per email, optional filter for event type"
       ses_daily_not_suppressed_bounces = "Displays amount of bounced emails per day, filtering out bounces caused by addresses being on the suppression list"
@@ -66,7 +66,8 @@ resource "aws_athena_named_query" "cloudfront" {
 }
 
 resource "aws_athena_named_query" "cloudtrail" {
-  for_each    = local.named_queries.cloudtrail
+  for_each = local.named_queries.cloudtrail
+
   name        = replace(each.key, "_", "-")
   database    = aws_athena_database.cloudtrail[0].name
   description = each.value
@@ -80,7 +81,8 @@ resource "aws_athena_named_query" "cloudtrail" {
 }
 
 resource "aws_athena_named_query" "ses" {
-  for_each    = local.named_queries.ses
+  for_each = local.named_queries.ses
+
   name        = replace(each.key, "_", "-")
   database    = aws_athena_database.ses[0].name
   description = each.value
diff --git a/tests/test_input_parsing_cloudfront.tftest.hcl b/tests/test_input_parsing_cloudfront.tftest.hcl
new file mode 100644
index 0000000..f7f76ce
--- /dev/null
+++ b/tests/test_input_parsing_cloudfront.tftest.hcl
@@ -0,0 +1,39 @@
+mock_provider "aws" {}
+
+run "dont_create_resources_without_input" {
+  variables {
+    query_bucket_name = "test"
+  }
+  assert {
+    condition     = length(local.named_queries.cloudfront) == 0
+    error_message = "local.named_queries.cloudfront should have 0 elements, but has ${length(local.named_queries.cloudfront)}"
+  }
+  assert {
+    condition     = length(aws_athena_database.cloudfront) == 0
+    error_message = "aws_athena_database.cloudfront should have 0 instances, but has ${length(aws_athena_database.cloudfront)}"
+  }
+  assert {
+    condition     = length(aws_athena_named_query.cloudfront) == 0
+    error_message = "aws_athena_named_query.cloudfront should have 0 instances, but has ${length(aws_athena_database.cloudfront)}"
+  }
+}
+
+run "create_resources_with_correct_input" {
+  variables {
+    query_bucket_name = "test"
+    cloudfront        = "cloudfront-bucket"
+  }
+
+  assert {
+    condition     = length(local.named_queries.cloudfront) != 0
+    error_message = "local.named_queries.cloudfront should not have 0 elements"
+  }
+  assert {
+    condition     = length(aws_athena_database.cloudfront) == 1
+    error_message = "aws_athena_database.cloudfront should have 1 instance, but has ${length(aws_athena_database.cloudfront)}"
+  }
+  assert {
+    condition     = length(aws_athena_named_query.cloudfront) != 0
+    error_message = "aws_athena_named_query.cloudfront should not have 0 element"
+  }
+}
diff --git a/tests/test_input_parsing_cloudtrail.tftest.hcl b/tests/test_input_parsing_cloudtrail.tftest.hcl
new file mode 100644
index 0000000..c33bea2
--- /dev/null
+++ b/tests/test_input_parsing_cloudtrail.tftest.hcl
@@ -0,0 +1,41 @@
+mock_provider "aws" {}
+
+run "dont_create_resources_without_input" {
+  variables {
+    query_bucket_name = "test"
+  }
+  assert {
+    condition     = length(local.named_queries.cloudtrail) == 0
+    error_message = "local.named_queries.cloudtrail should have 0 elements, but has ${length(local.named_queries.cloudtrail)}"
+  }
+  assert {
+    condition     = length(aws_athena_database.cloudtrail) == 0
+    error_message = "aws_athena_database.cloudtrail should have 0 instances, but has ${length(aws_athena_database.cloudtrail)}"
+  }
+  assert {
+    condition     = length(aws_athena_named_query.cloudtrail) == 0
+    error_message = "aws_athena_named_query.cloudtrail should have 0 instances, but has ${length(aws_athena_database.cloudtrail)}"
+  }
+}
+
+run "create_resources_with_correct_input" {
+  variables {
+    query_bucket_name = "test"
+    cloudtrail = {
+      bucket_name = "cloudtrail-bucket"
+    }
+  }
+
+  assert {
+    condition     = length(local.named_queries.cloudtrail) != 0
+    error_message = "local.named_queries.cloudtrail should not have 0 elements"
+  }
+  assert {
+    condition     = length(aws_athena_database.cloudtrail) == 1
+    error_message = "aws_athena_database.cloudtrail should have 1 instance, but has ${length(aws_athena_database.cloudtrail)}"
+  }
+  assert {
+    condition     = length(aws_athena_named_query.cloudtrail) != 0
+    error_message = "aws_athena_named_query.cloudtrail should not have 0 element"
+  }
+}
diff --git a/tests/test_input_parsing_ses.tftest.hcl b/tests/test_input_parsing_ses.tftest.hcl
new file mode 100644
index 0000000..a6030c6
--- /dev/null
+++ b/tests/test_input_parsing_ses.tftest.hcl
@@ -0,0 +1,39 @@
+mock_provider "aws" {}
+
+run "dont_create_resources_without_input" {
+  variables {
+    query_bucket_name = "test"
+  }
+  assert {
+    condition     = length(local.named_queries.ses) == 0
+    error_message = "local.named_queries.ses should have 0 elements, but has ${length(local.named_queries.ses)}"
+  }
+  assert {
+    condition     = length(aws_athena_database.ses) == 0
+    error_message = "aws_athena_database.ses should have 0 instances, but has ${length(aws_athena_database.ses)}"
+  }
+  assert {
+    condition     = length(aws_athena_named_query.ses) == 0
+    error_message = "aws_athena_named_query.ses should have 0 instances, but has ${length(aws_athena_database.ses)}"
+  }
+}
+
+run "create_resources_with_correct_input" {
+  variables {
+    query_bucket_name = "test"
+    ses               = "ses-bucket"
+  }
+
+  assert {
+    condition     = length(local.named_queries.ses) != 0
+    error_message = "local.named_queries.ses should not have 0 elements"
+  }
+  assert {
+    condition     = length(aws_athena_database.ses) == 1
+    error_message = "aws_athena_database.ses should have 1 instance, but has ${length(aws_athena_database.ses)}"
+  }
+  assert {
+    condition     = length(aws_athena_named_query.ses) != 0
+    error_message = "aws_athena_named_query.ses should not have 0 element"
+  }
+}
diff --git a/variables.tf b/variables.tf
index de8feb4..d8bb5e4 100644
--- a/variables.tf
+++ b/variables.tf
@@ -12,10 +12,12 @@ variable "cloudfront" {
 variable "cloudtrail" {
   description = "Configuration for cloudtrail. Creates a db and saved cloudfront queries if bucket_name is set. Only set prefix if you configured one in your cloudtrail"
   type = object({
-    bucket_name = optional(string)
+    bucket_name = string
     prefix      = optional(string)
   })
-  default = {}
+  default = {
+    bucket_name = null
+  }
 }
 
 variable "ses" {
diff --git a/versions.tf b/versions.tf
index f0d7e15..9284a89 100644
--- a/versions.tf
+++ b/versions.tf
@@ -1,8 +1,8 @@
 terraform {
-  required_version = ">= 1.7.0"
+  required_version = ">= 1.6.0"
   required_providers {
     aws = {
-      version = ">= 5.40.0"
+      version = ">= 4.55.0"
     }
   }
 }