diff --git a/lib/analyze-action-post.js b/lib/analyze-action-post.js
index 3894cba111..e68a990816 100644
--- a/lib/analyze-action-post.js
+++ b/lib/analyze-action-post.js
@@ -117076,6 +117076,9 @@ function getCachedCodeQlVersion() {
 async function codeQlVersionAtLeast(codeql, requiredVersion) {
   return semver.gte((await codeql.getVersion()).version, requiredVersion);
 }
+function isInTestMode() {
+  return process.env["CODEQL_ACTION_TEST_MODE" /* TEST_MODE */] === "true";
+}
 function wrapError(error2) {
   return error2 instanceof Error ? error2 : new Error(String(error2));
 }
@@ -117195,6 +117198,9 @@ var githubUtils = __toESM(require_utils4());
 var retry = __toESM(require_dist_node15());
 var import_console_log_level = __toESM(require_console_log_level());
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -117202,7 +117208,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/analyze-action.js b/lib/analyze-action.js
index 5389f58483..65aead639e 100644
--- a/lib/analyze-action.js
+++ b/lib/analyze-action.js
@@ -90177,6 +90177,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -90184,7 +90187,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/autobuild-action.js b/lib/autobuild-action.js
index e7c4027e6d..401cdb6721 100644
--- a/lib/autobuild-action.js
+++ b/lib/autobuild-action.js
@@ -77902,6 +77902,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -77909,7 +77912,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/init-action-post.js b/lib/init-action-post.js
index efa766c353..965f40ff0c 100644
--- a/lib/init-action-post.js
+++ b/lib/init-action-post.js
@@ -128396,6 +128396,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -128403,7 +128406,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/init-action.js b/lib/init-action.js
index 059ebffffb..9bf397d0cd 100644
--- a/lib/init-action.js
+++ b/lib/init-action.js
@@ -86029,6 +86029,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -86036,7 +86039,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/resolve-environment-action.js b/lib/resolve-environment-action.js
index 68acb6c12d..0b385ffb67 100644
--- a/lib/resolve-environment-action.js
+++ b/lib/resolve-environment-action.js
@@ -77910,6 +77910,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -77917,7 +77920,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/start-proxy-action-post.js b/lib/start-proxy-action-post.js
index 5d80b2ed28..cab82cb86b 100644
--- a/lib/start-proxy-action-post.js
+++ b/lib/start-proxy-action-post.js
@@ -117042,6 +117042,9 @@ var ConfigurationError = class extends Error {
     super(message);
   }
 };
+function isInTestMode() {
+  return process.env["CODEQL_ACTION_TEST_MODE" /* TEST_MODE */] === "true";
+}
 function getErrorMessage(error2) {
   return error2 instanceof Error ? error2.message : String(error2);
 }
@@ -117078,6 +117081,9 @@ var githubUtils = __toESM(require_utils4());
 var retry = __toESM(require_dist_node15());
 var import_console_log_level = __toESM(require_console_log_level());
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -117085,7 +117091,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/start-proxy-action.js b/lib/start-proxy-action.js
index c9aa76f792..4b57754546 100644
--- a/lib/start-proxy-action.js
+++ b/lib/start-proxy-action.js
@@ -49321,6 +49321,9 @@ async function delay(milliseconds, opts) {
     }
   });
 }
+function isInTestMode() {
+  return process.env["CODEQL_ACTION_TEST_MODE" /* TEST_MODE */] === "true";
+}
 function getErrorMessage(error2) {
   return error2 instanceof Error ? error2.message : String(error2);
 }
@@ -49370,6 +49373,9 @@ var core6 = __toESM(require_core());
 var githubUtils = __toESM(require_utils4());
 var retry = __toESM(require_dist_node15());
 var import_console_log_level = __toESM(require_console_log_level());
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -49377,7 +49383,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/upload-lib.js b/lib/upload-lib.js
index 9eeaabbd10..38ce9a574c 100644
--- a/lib/upload-lib.js
+++ b/lib/upload-lib.js
@@ -88523,6 +88523,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -88530,7 +88533,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/upload-sarif-action-post.js b/lib/upload-sarif-action-post.js
index d1de1661bd..1b332a9b5c 100644
--- a/lib/upload-sarif-action-post.js
+++ b/lib/upload-sarif-action-post.js
@@ -117042,6 +117042,9 @@ var ConfigurationError = class extends Error {
     super(message);
   }
 };
+function isInTestMode() {
+  return process.env["CODEQL_ACTION_TEST_MODE" /* TEST_MODE */] === "true";
+}
 function getErrorMessage(error2) {
   return error2 instanceof Error ? error2.message : String(error2);
 }
@@ -117082,6 +117085,9 @@ var githubUtils = __toESM(require_utils4());
 var retry = __toESM(require_dist_node15());
 var import_console_log_level = __toESM(require_console_log_level());
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -117089,7 +117095,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/lib/upload-sarif-action.js b/lib/upload-sarif-action.js
index f7d36732b2..96a96a73b9 100644
--- a/lib/upload-sarif-action.js
+++ b/lib/upload-sarif-action.js
@@ -88775,6 +88775,9 @@ function parseRepositoryNwo(input) {
 
 // src/api-client.ts
 var GITHUB_ENTERPRISE_VERSION_HEADER = "x-github-enterprise-version";
+function getRetryConfig() {
+  return isInTestMode() ? { retries: 10, retryAfterBaseValue: 1e4 } : { retries: 3, retryAfterBaseValue: 1e3 };
+}
 function createApiClientWithDetails(apiDetails, { allowExternal = false } = {}) {
   const auth = allowExternal && apiDetails.externalRepoAuth || apiDetails.auth;
   const retryingOctokit = githubUtils.GitHub.plugin(retry.retry);
@@ -88782,7 +88785,8 @@ function createApiClientWithDetails(apiDetails, { allowExternal = false } = {})
     githubUtils.getOctokitOptions(auth, {
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
-      log: (0, import_console_log_level.default)({ level: "debug" })
+      log: (0, import_console_log_level.default)({ level: "debug" }),
+      retry: getRetryConfig()
     })
   );
 }
diff --git a/src/api-client.test.ts b/src/api-client.test.ts
index d2647b2bbb..f93cb30513 100644
--- a/src/api-client.test.ts
+++ b/src/api-client.test.ts
@@ -36,6 +36,7 @@ test("getApiClient", async (t) => {
       baseUrl: "http://api.github.localhost",
       log: sinon.match.any,
       userAgent: `CodeQL-Action/${actionsUtil.getActionVersion()}`,
+      retry: api.getRetryConfig(),
     }),
   );
 });
diff --git a/src/api-client.ts b/src/api-client.ts
index 207b3c86af..be59fbe120 100644
--- a/src/api-client.ts
+++ b/src/api-client.ts
@@ -12,6 +12,7 @@ import {
   GitHubVariant,
   GitHubVersion,
   isHTTPError,
+  isInTestMode,
   parseGitHubUrl,
   parseMatrixInput,
 } from "./util";
@@ -38,6 +39,20 @@ export interface GitHubApiExternalRepoDetails {
   apiURL: string | undefined;
 }
 
+export function getRetryConfig(): {
+  retries: number;
+  retryAfterBaseValue?: number;
+} {
+  // If we are in test mode, increase the allowed number of retries to 10
+  // and the base backoff from 1s to 10s. `plugin-retry` will wait
+  // `(failedAttempts ^ 2) * retryAfterBaseValue`-long (in ms) after
+  // each failed attempt.
+  // If we are not in test mode, we use the default configuration.
+  return isInTestMode()
+    ? { retries: 10, retryAfterBaseValue: 10_000 }
+    : { retries: 3, retryAfterBaseValue: 1_000 };
+}
+
 function createApiClientWithDetails(
   apiDetails: GitHubApiCombinedDetails,
   { allowExternal = false } = {},
@@ -50,6 +65,7 @@ function createApiClientWithDetails(
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
       log: consoleLogLevel({ level: "debug" }),
+      retry: getRetryConfig(),
     }),
   );
 }