diff --git a/.gitignore b/.gitignore
index a1d3f8b..19c891e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -136,3 +136,6 @@ src/pytest_dbt_core/_version.py
 # dbt
 .user.yml
 dbt_packages/
+
+# Editor
+.idea/
diff --git a/docs/source/_static/dbt_project/macros/spark_adapter.sql b/docs/source/_static/dbt_project/macros/spark_adapter.sql
new file mode 100644
index 0000000..2f32665
--- /dev/null
+++ b/docs/source/_static/dbt_project/macros/spark_adapter.sql
@@ -0,0 +1,7 @@
+{% macro spark__list_relations_without_caching(relation) %}
+  {% call statement('list_relations_without_caching', fetch_result=True) -%}
+    show table extended in {{ relation }} like '*'
+  {% endcall %}
+
+  {% do return(load_result('list_relations_without_caching').table) %}
+{% endmacro %}
diff --git a/setup.cfg b/setup.cfg
index 4b3fba9..46e10fb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -72,8 +72,8 @@ spark_options =
 [tox:tox]
 envlist =
     py3.7-dbt-spark{11,12,13,14,15}  # dbt-spark v1.6 or later does not support Python 3.7
-    py{3.8,3.9,3.10}-dbt-spark{11,12,13,14,15,16,17}
-    py3.11-dbt-spark{14,15,16,17}  # Previous dbt-spark versions fail when using Python 3.11
+    py{3.8,3.9,3.10}-dbt-spark{11,12,13,14,15,16,17,18}
+    py3.11-dbt-spark{14,15,16,17,18}  # Previous dbt-spark versions fail when using Python 3.11
 isolated_build = true
 skip_missing_interpreters = true
 
@@ -95,6 +95,7 @@ deps =
     dbt-spark15: dbt-spark[ODBC]~=1.5.0
     dbt-spark16: dbt-spark[ODBC]~=1.6.0
     dbt-spark17: dbt-spark[ODBC]~=1.7.0
+    dbt-spark18: dbt-spark[ODBC]~=1.8.0
     pip >= 19.3.1
 extras = test
 commands = pytest {posargs:tests}
@@ -115,6 +116,7 @@ deps =
     dbt-spark15: dbt-spark[ODBC]~=1.5.0
     dbt-spark16: dbt-spark[ODBC]~=1.6.0
     dbt-spark17: dbt-spark[ODBC]~=1.7.0
+    dbt-spark18: dbt-spark[ODBC]~=1.8.0
     pip >= 19.3.1
 extras = test
 commands_pre = dbt deps --project-dir {toxinidir}/docs/source/_static/dbt_project --profiles-dir {toxinidir}/docs/source/_static/dbt_project
diff --git a/src/pytest_dbt_core/fixtures.py b/src/pytest_dbt_core/fixtures.py
index 6cfe19e..d416528 100644
--- a/src/pytest_dbt_core/fixtures.py
+++ b/src/pytest_dbt_core/fixtures.py
@@ -15,7 +15,6 @@
 from dbt.context import providers
 from dbt.contracts.graph.manifest import Manifest
 from dbt.parser.manifest import ManifestLoader
-from dbt.semver import VersionSpecifier
 from dbt.tracking import User
 
 from dbt.adapters.factory import (  # isort:skip
@@ -28,6 +27,15 @@
 dbt.tracking.active_user = User(os.getcwd())
 
 
+def _get_installed_dbt_version() -> tuple[int, int]:
+    """Cast a dbt version to a tuple with major and minor version."""
+    installed_dbt_version = version.get_installed_version()
+    return int(installed_dbt_version.major), int(installed_dbt_version.minor)
+
+
+DBT_INSTALLED_VERSION = _get_installed_dbt_version()
+
+
 @dataclasses.dataclass(frozen=True)
 class Args:
     """
@@ -47,6 +55,8 @@ class Args:
     target: str | None
     profile: str | None
     threads: int | None
+    # Required from dbt version 1.8 onwards
+    REQUIRE_RESOURCE_NAMES_WITHOUT_SPACES = False
 
 
 @pytest.fixture
@@ -74,7 +84,7 @@ def config(request: SubRequest) -> RuntimeConfig:
         threads=None,
     )
 
-    if VersionSpecifier("1", "5", "12") < version.get_installed_version():
+    if DBT_INSTALLED_VERSION > (1, 5):
         # See https://github.com/dbt-labs/dbt-core/issues/9183
         project_flags = project.read_project_flags(
             args.project_dir, args.profiles_dir
@@ -102,7 +112,12 @@ def adapter(config: RuntimeConfig) -> AdapterContainer:
     AdapterContainer
         The adapter.
     """
-    register_adapter(config)
+    if DBT_INSTALLED_VERSION > (1, 7):
+        from dbt.mp_context import get_mp_context
+
+        register_adapter(config, get_mp_context())
+    else:
+        register_adapter(config)
     adapter = get_adapter(config)
     adapter.acquire_connection()
     return adapter
@@ -125,6 +140,12 @@ def manifest(
     Manifest
         The manifest.
     """
+    if DBT_INSTALLED_VERSION > (1, 7):
+        from dbt_common.clients.system import get_env
+        from dbt_common.context import set_invocation_context
+
+        set_invocation_context(get_env())
+
     manifest = ManifestLoader.get_full_manifest(adapter.config)
     return manifest