diff --git a/terraform/provider/litellm/client_test.go b/terraform/provider/litellm/client_test.go
index 56f76565616..77c7bf817d8 100644
--- a/terraform/provider/litellm/client_test.go
+++ b/terraform/provider/litellm/client_test.go
@@ -1,10 +1,67 @@
 package litellm
 
 import (
+	"errors"
+	"net/http"
+	"net/http/httptest"
 	"strings"
 	"testing"
 )
 
+func TestSendRequestAcceptsFullSuccessRange(t *testing.T) {
+	tests := []struct {
+		name       string
+		statusCode int
+		wantErr    bool
+		wantValue  string
+	}{
+		{name: "200 OK", statusCode: http.StatusOK, wantErr: false, wantValue: "ok"},
+		{name: "201 Created", statusCode: http.StatusCreated, wantErr: false, wantValue: "created"},
+		{name: "202 Accepted", statusCode: http.StatusAccepted, wantErr: false, wantValue: "accepted"},
+		{name: "400 Bad Request", statusCode: http.StatusBadRequest, wantErr: true},
+		{name: "404 Not Found", statusCode: http.StatusNotFound, wantErr: true},
+		{name: "500 Internal Server Error", statusCode: http.StatusInternalServerError, wantErr: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(tt.statusCode)
+				w.Write([]byte(`{"value":"` + tt.wantValue + `"}`))
+			}))
+			defer srv.Close()
+
+			client := NewClient(srv.URL, "test-key", true)
+			result, err := client.sendRequest("POST", "/whatever", map[string]string{"foo": "bar"})
+
+			if tt.wantErr {
+				if err == nil {
+					t.Fatalf("sendRequest returned no error for status %d", tt.statusCode)
+				}
+				var apiErr *apiError
+				if !errors.As(err, &apiErr) {
+					t.Fatalf("error is not *apiError: %v", err)
+				}
+				if apiErr.StatusCode != tt.statusCode {
+					t.Errorf("apiErr.StatusCode = %d, want %d", apiErr.StatusCode, tt.statusCode)
+				}
+				if tt.statusCode == http.StatusNotFound && !isNotFound(err) {
+					t.Errorf("isNotFound(err) = false for 404, want true")
+				}
+				return
+			}
+
+			if err != nil {
+				t.Fatalf("sendRequest returned unexpected error: %v", err)
+			}
+			if result["value"] != tt.wantValue {
+				t.Errorf("result[value] = %v, want %q", result["value"], tt.wantValue)
+			}
+		})
+	}
+}
+
 func TestRedactSensitiveDataNestedCredentialValues(t *testing.T) {
 	c := NewClient("http://localhost:4000", "sk-test", false)
 
diff --git a/terraform/provider/litellm/utils_test.go b/terraform/provider/litellm/utils_test.go
new file mode 100644
index 00000000000..e942dde288f
--- /dev/null
+++ b/terraform/provider/litellm/utils_test.go
@@ -0,0 +1,98 @@
+package litellm
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestHandleAPIResponseAcceptsFullSuccessRange(t *testing.T) {
+	tests := []struct {
+		name       string
+		statusCode int
+		wantErr    bool
+	}{
+		{name: "200 OK", statusCode: http.StatusOK, wantErr: false},
+		{name: "201 Created", statusCode: http.StatusCreated, wantErr: false},
+		{name: "202 Accepted", statusCode: http.StatusAccepted, wantErr: false},
+		{name: "400 Bad Request", statusCode: http.StatusBadRequest, wantErr: true},
+		{name: "404 Not Found", statusCode: http.StatusNotFound, wantErr: true},
+		{name: "500 Internal Server Error", statusCode: http.StatusInternalServerError, wantErr: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			rec := httptest.NewRecorder()
+			rec.WriteHeader(tt.statusCode)
+			rec.WriteString(`{"model_name":"gpt-4o"}`)
+			resp := rec.Result()
+
+			client := NewClient("http://localhost:4000", "test-key", true)
+			got, err := handleAPIResponse(resp, map[string]interface{}{"model_name": "gpt-4o"}, client)
+
+			if tt.wantErr {
+				if err == nil {
+					t.Fatalf("handleAPIResponse returned no error for status %d", tt.statusCode)
+				}
+				if !strings.Contains(err.Error(), strconv.Itoa(tt.statusCode)) {
+					t.Errorf("error %q does not mention status %d", err.Error(), tt.statusCode)
+				}
+				return
+			}
+
+			if err != nil {
+				t.Fatalf("handleAPIResponse returned unexpected error: %v", err)
+			}
+			if got.ModelName != "gpt-4o" {
+				t.Errorf("got.ModelName = %q, want gpt-4o", got.ModelName)
+			}
+		})
+	}
+}
+
+func TestHandleMCPAPIResponseAcceptsFullSuccessRange(t *testing.T) {
+	tests := []struct {
+		name       string
+		statusCode int
+		wantErr    bool
+	}{
+		{name: "200 OK", statusCode: http.StatusOK, wantErr: false},
+		{name: "201 Created", statusCode: http.StatusCreated, wantErr: false},
+		{name: "202 Accepted", statusCode: http.StatusAccepted, wantErr: false},
+		{name: "400 Bad Request", statusCode: http.StatusBadRequest, wantErr: true},
+		{name: "404 Not Found", statusCode: http.StatusNotFound, wantErr: true},
+		{name: "500 Internal Server Error", statusCode: http.StatusInternalServerError, wantErr: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			rec := httptest.NewRecorder()
+			rec.WriteHeader(tt.statusCode)
+			rec.WriteString(`{"server_id":"srv-1","server_name":"gh"}`)
+			resp := rec.Result()
+
+			client := NewClient("http://localhost:4000", "test-key", true)
+			var mcpResp MCPServerResponse
+			err := handleMCPAPIResponse(resp, &mcpResp, client)
+
+			if tt.wantErr {
+				if err == nil {
+					t.Fatalf("handleMCPAPIResponse returned no error for status %d", tt.statusCode)
+				}
+				if !strings.Contains(err.Error(), strconv.Itoa(tt.statusCode)) {
+					t.Errorf("error %q does not mention status %d", err.Error(), tt.statusCode)
+				}
+				return
+			}
+
+			if err != nil {
+				t.Fatalf("handleMCPAPIResponse returned unexpected error: %v", err)
+			}
+			if mcpResp.ServerID != "srv-1" {
+				t.Errorf("mcpResp.ServerID = %q, want srv-1", mcpResp.ServerID)
+			}
+		})
+	}
+}