diff --git a/forms.go b/forms.go
index 95b4174..15f8f17 100644
--- a/forms.go
+++ b/forms.go
@@ -154,7 +154,7 @@ Relative to pwd e.g. if db is in this dir -> cool_ducks.db`).
 		huh.NewGroup(
 			huh.NewNote().
 				Title("🚧🚨 Choose your build directory carefully! 🚨🚧").
-				Description(`_I highly recommend choosing a new or empty directory to build into._
+				Description(`Choose a _new_ or _empty_ directory.
 If you use an existing directory,
 tbd will overwrite any existing files of the same name.`),
 		),
diff --git a/generate_column_desc.go b/generate_column_desc.go
index 4d7b227..504ded7 100644
--- a/generate_column_desc.go
+++ b/generate_column_desc.go
@@ -136,6 +136,7 @@ func GenerateColumnDescriptions(tables shared.SourceTables) {
 			}(i, j)
 		}
 	}
+	wg.Wait()
 }
 
 func GetGroqResponse(prompt string) (GroqResponse, error) {
diff --git a/generate_column_desc_test.go b/generate_column_desc_test.go
new file mode 100644
index 0000000..ede81cc
--- /dev/null
+++ b/generate_column_desc_test.go
@@ -0,0 +1,47 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/jarcoal/httpmock"
+)
+
+func TestGetGroqResponse(t *testing.T) {
+	prompt := "Who destroyed Orthanc"
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
+	httpmock.RegisterResponder("POST", "https://api.groq.com/openai/v1/chat/completions",
+		httpmock.NewStringResponder(200, `{"choices": [{"index": 0, "message": {"role": "assistant","content": "Treebeard and the Ents destroyed Orthanc."}}]}`))
+	GroqResponse, err := GetGroqResponse(prompt)
+	if err != nil {
+		t.Error("expected", nil, "got", err)
+	}
+	info := httpmock.GetCallCountInfo()
+	if info["POST https://api.groq.com/openai/v1/chat/completions"] != 1 {
+		t.Error("expected", 1, "got", info["POST https://api.groq.com/openai/v1/chat/completions"])
+	}
+	expected := "Treebeard and the Ents destroyed Orthanc."
+	if GroqResponse.Choices[0].Message.Content != expected {
+		t.Error("expected", expected, "got", GroqResponse.Choices[0].Message.Content)
+	}
+}
+
+func TestGenerateColumnDescriptions(t *testing.T) {
+	ts := CreateTempSourceTables()
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
+	httpmock.RegisterResponder("POST", "https://api.groq.com/openai/v1/chat/completions",
+		httpmock.NewStringResponder(200, `{"choices": [{"index": 0, "message": {"role": "assistant","content": "lord of rivendell"}}]}`))
+	GenerateColumnDescriptions(ts)
+
+	info := httpmock.GetCallCountInfo()
+	if info["POST https://api.groq.com/openai/v1/chat/completions"] != 2 {
+		t.Error("expected", 2, "got", info["POST https://api.groq.com/openai/v1/chat/completions"])
+	}
+
+	expected := "lord of rivendell"
+	desc := ts.SourceTables[0].Columns[0].Description
+	if desc != expected {
+		t.Error("expected", expected, "got", desc)
+	}
+}
diff --git a/get_dbt_profile_test.go b/get_dbt_profile_test.go
index e146ac3..fb17ec9 100644
--- a/get_dbt_profile_test.go
+++ b/get_dbt_profile_test.go
@@ -9,7 +9,8 @@ func TestGetDbtProfile(t *testing.T) {
 	CreateTempDbtProfile(t)
 	defer os.RemoveAll(os.Getenv("HOME"))
 	defer os.Unsetenv("HOME")
-	// Profile exists
+	
+  // Profile exists
 	profile, err := GetDbtProfile("elf")
 	if err != nil {
 		t.Errorf("GetDbtProfile returned an error for an existing profile: %v", err)
@@ -20,6 +21,8 @@ func TestGetDbtProfile(t *testing.T) {
 	if profile.Outputs["dev"].ConnType != "snowflake" {
 		t.Errorf("Expected connection type 'snowflake', got '%s'", profile.Outputs["dev"].ConnType)
 	}
+
+  // Profile exists, DuckDB
 	profile, err = GetDbtProfile("dwarf")
 	if err != nil {
 		t.Errorf("GetDbtProfile returned an error for an existing profile: %v", err)
@@ -33,6 +36,7 @@ func TestGetDbtProfile(t *testing.T) {
 	if profile.Outputs["dev"].Schema != "balins_tomb" {
 		t.Errorf("Expected schema 'balins_tomb', got '%s'", profile.Outputs["dev"].Schema)
 	}
+  // If using dbt profile with DuckDB, path should be unedited
 	if profile.Outputs["dev"].Path != "/usr/local/var/dwarf.db" {
 		t.Errorf("Expected path '/usr/local/var/dwarf.db', got '%s'", profile.Outputs["dev"].Path)
 	}
diff --git a/go.mod b/go.mod
index 3e3d90b..d688ac7 100644
--- a/go.mod
+++ b/go.mod
@@ -64,6 +64,7 @@ require (
 	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
 	github.com/googleapis/gax-go/v2 v2.12.3 // indirect
 	github.com/gsterjov/go-libsecret v0.0.0-20161001094733-a6f4afe4910c // indirect
+	github.com/jarcoal/httpmock v1.3.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/klauspost/compress v1.17.7 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
diff --git a/go.sum b/go.sum
index 4d8e53c..27e09be 100644
--- a/go.sum
+++ b/go.sum
@@ -172,6 +172,8 @@ github.com/googleapis/gax-go/v2 v2.12.3 h1:5/zPPDvw8Q1SuXjrqrZslrqT7dL/uJT2CQii/
 github.com/googleapis/gax-go/v2 v2.12.3/go.mod h1:AKloxT6GtNbaLm8QTNSidHUVsHYcBHwWRvkNFJUQcS4=
 github.com/gsterjov/go-libsecret v0.0.0-20161001094733-a6f4afe4910c h1:6rhixN/i8ZofjG1Y75iExal34USq5p+wiN1tpie8IrU=
 github.com/gsterjov/go-libsecret v0.0.0-20161001094733-a6f4afe4910c/go.mod h1:NMPJylDgVpX0MLRlPy15sqSwOFv/U1GZ2m21JhFfek0=
+github.com/jarcoal/httpmock v1.3.1 h1:iUx3whfZWVf3jT01hQTO/Eo5sAYtB2/rqaUuOtpInww=
+github.com/jarcoal/httpmock v1.3.1/go.mod h1:3yb8rc4BI7TCBhFY8ng0gjuLKJNquuDNiPaZjnENuYg=
 github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
 github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
diff --git a/main.go b/main.go
index 34bc94e..da8975c 100644
--- a/main.go
+++ b/main.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"log"
-	"sync"
 	"time"
 
 	"github.com/charmbracelet/huh/spinner"
@@ -52,17 +51,10 @@ func main() {
 			GenerateColumnDescriptions(ts)
 		}
 		PrepBuildDir(bd)
-		var wg sync.WaitGroup
-		wg.Add(2)
-		go func() {
-			defer wg.Done()
-			WriteYAML(ts, bd)
-		}()
-		go func() {
-			defer wg.Done()
-			WriteStagingModels(ts, bd)
-		}()
-		wg.Wait()
+		err = WriteFiles(ts, bd)
+		if err != nil {
+			log.Fatalf("Error writing files: %v\n", err)
+		}
 	}).Title("🏎️✨ Generating YAML and SQL files...").Run()
 	if err != nil {
 		log.Fatalf("Error running spinner action: %v\n", err)
diff --git a/set_connection_details_test.go b/set_connection_details_test.go
index 90cc9fc..49fcdba 100644
--- a/set_connection_details_test.go
+++ b/set_connection_details_test.go
@@ -95,9 +95,14 @@ func TestSetConnectionDetailsWithDuckDBWithoutDbtProfile(t *testing.T) {
 		Confirm:              true,
 	}
 	connectionDetails := SetConnectionDetails(formResponse)
+	wd, err := os.Getwd()
+	if err != nil {
+		t.Errorf("Failed to get working directory: %v", err)
+	}
+	p := wd + "/dwarf.db"
 	want := shared.ConnectionDetails{
 		ConnType: "duckdb",
-		Path:     "/Users/winnie/dev/tbd/dwarf.db",
+		Path:     p,
 		Database: "khazad_dum",
 		Schema:   "balins_tomb",
 	}
diff --git a/test_helpers.go b/test_helpers.go
index 391fc19..888d36b 100644
--- a/test_helpers.go
+++ b/test_helpers.go
@@ -4,6 +4,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/gwenwindflower/tbd/shared"
 )
 
 func CreateTempDbtProfile(t *testing.T) string {
@@ -52,3 +54,21 @@ dwarf:
 	os.Setenv("HOME", tmpDir)
 	return tmpDir
 }
+
+func CreateTempSourceTables() shared.SourceTables {
+	return shared.SourceTables{
+		SourceTables: []shared.SourceTable{
+			{
+				Name: "arwen",
+				Columns: []shared.Column{
+					{
+						Name:        "elrond",
+						DataType:    "string",
+						Description: "my dad",
+						Tests:       []string{"unique", "not_null"},
+					},
+				},
+			},
+		},
+	}
+}
diff --git a/write_files.go b/write_files.go
new file mode 100644
index 0000000..01f8034
--- /dev/null
+++ b/write_files.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/gwenwindflower/tbd/shared"
+)
+
+func WriteFiles(ts shared.SourceTables, bd string) error {
+	if len(ts.SourceTables) == 0 {
+		return errors.New("no tables to write")
+	}
+	var wg sync.WaitGroup
+	wg.Add(2)
+	go func() {
+		defer wg.Done()
+		WriteYAML(ts, bd)
+	}()
+	go func() {
+		defer wg.Done()
+		WriteStagingModels(ts, bd)
+	}()
+	wg.Wait()
+	return nil
+}
diff --git a/write_files_test.go b/write_files_test.go
new file mode 100644
index 0000000..6049018
--- /dev/null
+++ b/write_files_test.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/gwenwindflower/tbd/shared"
+)
+
+func TestWriteFiles(t *testing.T) {
+	ts := shared.SourceTables{
+		SourceTables: []shared.SourceTable{
+			{
+				Name: "table1",
+				Columns: []shared.Column{
+					{
+						Name:     "column1",
+						DataType: "type1",
+					},
+				},
+			},
+		},
+	}
+	bd := t.TempDir()
+	WriteFiles(ts, bd)
+}
+
+func TestWriteFilesError(t *testing.T) {
+	ts := shared.SourceTables{
+		SourceTables: []shared.SourceTable{},
+	}
+	bd := t.TempDir()
+
+	err := WriteFiles(ts, bd)
+	if err == nil {
+		t.Error("expected error, got nil")
+	} else {
+		if !strings.Contains(err.Error(), "no tables to write") {
+			t.Errorf("expected error to contain 'no tables to write', got %v", err)
+		}
+	}
+}